diff --git a/Sprint-1/1-key-exercises/1-count.js b/Sprint-1/1-key-exercises/1-count.js
deleted file mode 100644
index 117bcb2b6..000000000
--- a/Sprint-1/1-key-exercises/1-count.js
+++ /dev/null
@@ -1,6 +0,0 @@
-let count = 0;
-
-count = count + 1;
-
-// Line 1 is a variable declaration, creating the count variable with an initial value of 0
-// Describe what line 3 is doing, in particular focus on what = is doing
diff --git a/Sprint-1/1-key-exercises/2-initials.js b/Sprint-1/1-key-exercises/2-initials.js
deleted file mode 100644
index 47561f617..000000000
--- a/Sprint-1/1-key-exercises/2-initials.js
+++ /dev/null
@@ -1,11 +0,0 @@
-let firstName = "Creola";
-let middleName = "Katherine";
-let lastName = "Johnson";
-
-// Declare a variable called initials that stores the first character of each string.
-// This should produce the string "CKJ", but you must not write the characters C, K, or J in the code of your solution.
-
-let initials = ``;
-
-// https://www.google.com/search?q=get+first+character+of+string+mdn
-
diff --git a/Sprint-1/1-key-exercises/3-paths.js b/Sprint-1/1-key-exercises/3-paths.js
deleted file mode 100644
index ab90ebb28..000000000
--- a/Sprint-1/1-key-exercises/3-paths.js
+++ /dev/null
@@ -1,23 +0,0 @@
-// The diagram below shows the different names for parts of a file path on a Unix operating system
-
-// ┌─────────────────────┬────────────┐
-// │          dir        │    base    │
-// ├──────┬              ├──────┬─────┤
-// │ root │              │ name │ ext │
-// "  /    home/user/dir / file  .txt "
-// └──────┴──────────────┴──────┴─────┘
-
-// (All spaces in the "" line should be ignored. They are purely for formatting.)
-
-const filePath = "/Users/mitch/cyf/Module-JS1/week-1/interpret/file.txt";
-const lastSlashIndex = filePath.lastIndexOf("/");
-const base = filePath.slice(lastSlashIndex + 1);
-console.log(`The base part of ${filePath} is ${base}`);
-
-// Create a variable to store the dir part of the filePath variable
-// Create a variable to store the ext part of the variable
-
-const dir = ;
-const ext = ;
-
-// https://www.google.com/search?q=slice+mdn
\ No newline at end of file
diff --git a/Sprint-1/1-key-exercises/4-random.js b/Sprint-1/1-key-exercises/4-random.js
deleted file mode 100644
index 292f83aab..000000000
--- a/Sprint-1/1-key-exercises/4-random.js
+++ /dev/null
@@ -1,9 +0,0 @@
-const minimum = 1;
-const maximum = 100;
-
-const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
-
-// In this exercise, you will need to work out what num represents?
-// Try breaking down the expression and using documentation to explain what it means
-// It will help to think about the order in which expressions are evaluated
-// Try logging the value of num and running the program several times to build an idea of what the program is doing
diff --git a/Sprint-1/2-mandatory-errors/0.js b/Sprint-1/2-mandatory-errors/0.js
deleted file mode 100644
index cf6c5039f..000000000
--- a/Sprint-1/2-mandatory-errors/0.js
+++ /dev/null
@@ -1,2 +0,0 @@
-This is just an instruction for the first activity - but it is just for human consumption
-We don't want the computer to run these 2 lines - how can we solve this problem?
\ No newline at end of file
diff --git a/Sprint-1/2-mandatory-errors/1.js b/Sprint-1/2-mandatory-errors/1.js
deleted file mode 100644
index 7a43cbea7..000000000
--- a/Sprint-1/2-mandatory-errors/1.js
+++ /dev/null
@@ -1,4 +0,0 @@
-// trying to create an age variable and then reassign the value by 1
-
-const age = 33;
-age = age + 1;
diff --git a/Sprint-1/2-mandatory-errors/2.js b/Sprint-1/2-mandatory-errors/2.js
deleted file mode 100644
index e09b89831..000000000
--- a/Sprint-1/2-mandatory-errors/2.js
+++ /dev/null
@@ -1,5 +0,0 @@
-// Currently trying to print the string "I was born in Bolton" but it isn't working...
-// what's the error ?
-
-console.log(`I was born in ${cityOfBirth}`);
-const cityOfBirth = "Bolton";
diff --git a/Sprint-1/2-mandatory-errors/3.js b/Sprint-1/2-mandatory-errors/3.js
deleted file mode 100644
index ec101884d..000000000
--- a/Sprint-1/2-mandatory-errors/3.js
+++ /dev/null
@@ -1,9 +0,0 @@
-const cardNumber = 4533787178994213;
-const last4Digits = cardNumber.slice(-4);
-
-// The last4Digits variable should store the last 4 digits of cardNumber
-// However, the code isn't working
-// Before running the code, make and explain a prediction about why the code won't work
-// Then run the code and see what error it gives.
-// Consider: Why does it give this error? Is this what I predicted? If not, what's different?
-// Then try updating the expression last4Digits is assigned to, in order to get the correct value
diff --git a/Sprint-1/2-mandatory-errors/4.js b/Sprint-1/2-mandatory-errors/4.js
deleted file mode 100644
index 21dad8c5d..000000000
--- a/Sprint-1/2-mandatory-errors/4.js
+++ /dev/null
@@ -1,2 +0,0 @@
-const 12HourClockTime = "20:53";
-const 24hourClockTime = "08:53";
\ No newline at end of file
diff --git a/Sprint-1/3-mandatory-interpret/1-percentage-change.js b/Sprint-1/3-mandatory-interpret/1-percentage-change.js
deleted file mode 100644
index e24ecb8e1..000000000
--- a/Sprint-1/3-mandatory-interpret/1-percentage-change.js
+++ /dev/null
@@ -1,22 +0,0 @@
-let carPrice = "10,000";
-let priceAfterOneYear = "8,543";
-
-carPrice = Number(carPrice.replaceAll(",", ""));
-priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
-
-const priceDifference = carPrice - priceAfterOneYear;
-const percentageChange = (priceDifference / carPrice) * 100;
-
-console.log(`The percentage change is ${percentageChange}`);
-
-// Read the code and then answer the questions below
-
-// a) How many function calls are there in this file? Write down all the lines where a function call is made
-
-// b) Run the code and identify the line where the error is coming from - why is this error occurring? How can you fix this problem?
-
-// c) Identify all the lines that are variable reassignment statements
-
-// d) Identify all the lines that are variable declarations
-
-// e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
diff --git a/Sprint-1/3-mandatory-interpret/2-time-format.js b/Sprint-1/3-mandatory-interpret/2-time-format.js
deleted file mode 100644
index 47d239558..000000000
--- a/Sprint-1/3-mandatory-interpret/2-time-format.js
+++ /dev/null
@@ -1,25 +0,0 @@
-const movieLength = 8784; // length of movie in seconds
-
-const remainingSeconds = movieLength % 60;
-const totalMinutes = (movieLength - remainingSeconds) / 60;
-
-const remainingMinutes = totalMinutes % 60;
-const totalHours = (totalMinutes - remainingMinutes) / 60;
-
-const result = `${totalHours}:${remainingMinutes}:${remainingSeconds}`;
-console.log(result);
-
-// For the piece of code above, read the code and then answer the following questions
-
-// a) How many variable declarations are there in this program?
-
-// b) How many function calls are there?
-
-// c) Using documentation, explain what the expression movieLength % 60 represents
-// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
-
-// d) Interpret line 4, what does the expression assigned to totalMinutes mean?
-
-// e) What do you think the variable result represents? Can you think of a better name for this variable?
-
-// f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
diff --git a/Sprint-1/3-mandatory-interpret/3-to-pounds.js b/Sprint-1/3-mandatory-interpret/3-to-pounds.js
deleted file mode 100644
index 60c9ace69..000000000
--- a/Sprint-1/3-mandatory-interpret/3-to-pounds.js
+++ /dev/null
@@ -1,27 +0,0 @@
-const penceString = "399p";
-
-const penceStringWithoutTrailingP = penceString.substring(
-  0,
-  penceString.length - 1
-);
-
-const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
-const pounds = paddedPenceNumberString.substring(
-  0,
-  paddedPenceNumberString.length - 2
-);
-
-const pence = paddedPenceNumberString
-  .substring(paddedPenceNumberString.length - 2)
-  .padEnd(2, "0");
-
-console.log(`£${pounds}.${pence}`);
-
-// This program takes a string representing a price in pence
-// The program then builds up a string representing the price in pounds
-
-// You need to do a step-by-step breakdown of each line in this program
-// Try and describe the purpose / rationale behind each step
-
-// To begin, we can start with
-// 1. const penceString = "399p": initialises a string variable with the value "399p"
diff --git a/Sprint-2/1-key-errors/0.js b/Sprint-2/1-key-errors/0.js
index 653d6f5a0..97dc2bc8d 100644
--- a/Sprint-2/1-key-errors/0.js
+++ b/Sprint-2/1-key-errors/0.js
@@ -1,13 +1,28 @@
 // Predict and explain first...
 //  =============> write your prediction here
+// I predict the code is for capitalising the first letter of a string.
+
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
 
-function capitalise(str) {
+// the error is "The symbol "str" has already been declared."
+
+/* function capitalise(str) {
   let str = `${str[0].toUpperCase()}${str.slice(1)}`;
   return str;
 }
-
+*/
 // =============> write your explanation here
+// Error occurs because the str was mentioned as a parameter in the definition which is already a variable name in the function body.
+
 // =============> write your new code here
+
+function capitalise(str) {
+  const capitalisedStr = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return capitalisedStr;
+}
+
+// to call the function : 
+
+console.log(capitalise("naber?")); // Output: "Naber?"
\ No newline at end of file
diff --git a/Sprint-2/1-key-errors/1.js b/Sprint-2/1-key-errors/1.js
index f2d56151f..b07978805 100644
--- a/Sprint-2/1-key-errors/1.js
+++ b/Sprint-2/1-key-errors/1.js
@@ -1,7 +1,8 @@
 // Predict and explain first...
+// program is made for converting a decimal number into a percentage.
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
+// =============> I think error would occur because decimalNumber is declared twice.
 
 // Try playing computer with the example to work out what is going on
 
@@ -14,7 +15,15 @@ function convertToPercentage(decimalNumber) {
 
 console.log(decimalNumber);
 
-// =============> write your explanation here
+// =============> to fix the problem I will remove the second declaration of decimalNumber and use the parameter instead.
 
 // Finally, correct the code to fix the problem
-// =============> write your new code here
+// =============> 
+function convertToPercentage(decimalNumber) {
+  const percentage = `${decimalNumber * 100}%`;
+
+  return percentage;
+} 
+
+// to call the function
+console.log(convertToPercentage(1)); // Output: "100%"
diff --git a/Sprint-2/1-key-errors/2.js b/Sprint-2/1-key-errors/2.js
index aad57f7cf..5d81a4277 100644
--- a/Sprint-2/1-key-errors/2.js
+++ b/Sprint-2/1-key-errors/2.js
@@ -3,18 +3,24 @@
 
 // this function should square any number but instead we're going to get an error
 
-// =============> write your prediction of the error here
+// =============> My prediction is that error occurs because function trying to use a number as a function.
 
 function square(3) {
     return num * num;
 }
 
-// =============> write the error message here
+// =============> Expected identifier but found "3"
 
-// =============> explain this error message here
+// =============> While program waiting for an identifier, it found a number instead.
 
 // Finally, correct the code to fix the problem
 
-// =============> write your new code here
+// =============> 
+    function square(num) {
+        return num * num;
+    }
+
+    // to call the function
+    console.log(square(9)); // Output: 81
 
 
diff --git a/Sprint-2/2-mandatory-debug/0.js b/Sprint-2/2-mandatory-debug/0.js
index b27511b41..8719d40ab 100644
--- a/Sprint-2/2-mandatory-debug/0.js
+++ b/Sprint-2/2-mandatory-debug/0.js
@@ -1,14 +1,21 @@
 // Predict and explain first...
 
-// =============> write your prediction here
+// =============> My prediction is code wont return anything because the function does not have a return statement.
 
-function multiply(a, b) {
+/* function multiply(a, b) {
   console.log(a * b);
 }
 
-console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
-
-// =============> write your explanation here
+console.log(`The result of multiplying 10 and 32 is `${multiply(10, 32)}`);
+*/
+// =============> Once return statement is added, it will return the result of the multiplication.
 
 // Finally, correct the code to fix the problem
-//  =============> write your new code here
+//  =============> 
+
+  function multiply(a,b) 
+{
+return a*b;
+}
+
+console.log(`result of multiplying 2 times 2 = ${multiply(2, 2)}`);
diff --git a/Sprint-2/2-mandatory-debug/1.js b/Sprint-2/2-mandatory-debug/1.js
index 37cedfbcf..9d971ebd4 100644
--- a/Sprint-2/2-mandatory-debug/1.js
+++ b/Sprint-2/2-mandatory-debug/1.js
@@ -1,13 +1,20 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> Problem here is that sum does not return no value because return statement and a + b is in different lines.
 
-function sum(a, b) {
+/*function sum(a, b) {
   return;
   a + b;
 }
 
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
-
-// =============> write your explanation here
+*/
+// =============> Once we put a + b back in return statement it will work with no problem.
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+
+function sum(a, b) 
+{
+  return a + b;
+}
+
+console.log(`The sum of 45 and 12 is ${sum(45, 12)}`); // Output: "The sum of 45 and 12 is 57"
\ No newline at end of file
diff --git a/Sprint-2/2-mandatory-debug/2.js b/Sprint-2/2-mandatory-debug/2.js
index 57d3f5dc3..5b87d94bc 100644
--- a/Sprint-2/2-mandatory-debug/2.js
+++ b/Sprint-2/2-mandatory-debug/2.js
@@ -1,9 +1,9 @@
 // Predict and explain first...
 
 // Predict the output of the following code:
-// =============> Write your prediction here
+// =============> output would be undefined because getLastDigit uses global variable num.
 
-const num = 103;
+/* const num = 103;
 
 function getLastDigit() {
   return num.toString().slice(-1);
@@ -12,13 +12,20 @@ function getLastDigit() {
 console.log(`The last digit of 42 is ${getLastDigit(42)}`);
 console.log(`The last digit of 105 is ${getLastDigit(105)}`);
 console.log(`The last digit of 806 is ${getLastDigit(806)}`);
-
+*/
 // Now run the code and compare the output to your prediction
-// =============> write the output here
+// =============> Program is returning 3 for all console.log's.
 // Explain why the output is the way it is
-// =============> write your explanation here
+// =============> Num is defined to 103 which is global so anytime program calls getLastDigit it returns 3.
 // Finally, correct the code to fix the problem
-// =============> write your new code here
+// =============> 
+
+  function getLastDigit(num) 
+  {
+    return num.toString().slice(-1);
+  }
+
+  console.log(`The last digit of 41 is ${getLastDigit(41)}`);
 
 // This program should tell the user the last digit of each number.
 // Explain why getLastDigit is not working properly - correct the problem
diff --git a/Sprint-2/3-mandatory-implement/1-bmi.js b/Sprint-2/3-mandatory-implement/1-bmi.js
index 17b1cbde1..1e146a9ef 100644
--- a/Sprint-2/3-mandatory-implement/1-bmi.js
+++ b/Sprint-2/3-mandatory-implement/1-bmi.js
@@ -14,6 +14,11 @@
 // Then when we call this function with the weight and height
 // It should return their Body Mass Index to 1 decimal place
 
+const weight = 103;
+const height = 1.87;
+
 function calculateBMI(weight, height) {
-    // return the BMI of someone based off their weight and height
-}
\ No newline at end of file
+    return calculatedBMI = (weight / (height * height)).toFixed(1);
+}
+
+console.log(`the BMI of the person is ${calculateBMI(weight, height)}`);
\ No newline at end of file
diff --git a/Sprint-2/3-mandatory-implement/2-cases.js b/Sprint-2/3-mandatory-implement/2-cases.js
index 5b0ef77ad..eb0c3d5d2 100644
--- a/Sprint-2/3-mandatory-implement/2-cases.js
+++ b/Sprint-2/3-mandatory-implement/2-cases.js
@@ -14,3 +14,11 @@
 // You will need to come up with an appropriate name for the function
 // Use the MDN string documentation to help you find a solution
 // This might help https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/toUpperCase
+
+function magicToUpperCase(input)
+{
+    return input.toUpperCase().replaceAll(" ", "_");
+
+}
+
+console.log(magicToUpperCase("lord of the rings"));
\ No newline at end of file
diff --git a/Sprint-2/3-mandatory-implement/3-to-pounds.js b/Sprint-2/3-mandatory-implement/3-to-pounds.js
index 6265a1a70..17eae1240 100644
--- a/Sprint-2/3-mandatory-implement/3-to-pounds.js
+++ b/Sprint-2/3-mandatory-implement/3-to-pounds.js
@@ -4,3 +4,28 @@
 // You will need to declare a function called toPounds with an appropriately named parameter.
 
 // You should call this function a number of times to check it works for different inputs
+
+
+function toPounds(penceCount) {
+
+const penceWithoutP = penceCount.substring(
+  0,
+  penceCount.length - 1
+);
+
+const paddedPenceNumber = penceWithoutP.padStart(3, "0");
+const pounds = paddedPenceNumber.substring(
+  0,
+  paddedPenceNumber.length - 2
+);
+
+const pence = paddedPenceNumber
+  .substring(paddedPenceNumber.length - 2);
+
+
+const formattedPounds = pounds || "0";
+
+return `£${formattedPounds}.${pence}`;
+}
+
+console.log(`The amount in pounds is ${toPounds("10000000")}`);
\ No newline at end of file
diff --git a/Sprint-2/4-mandatory-interpret/time-format.js b/Sprint-2/4-mandatory-interpret/time-format.js
index 7c98eb0e8..dfca9f482 100644
--- a/Sprint-2/4-mandatory-interpret/time-format.js
+++ b/Sprint-2/4-mandatory-interpret/time-format.js
@@ -10,6 +10,7 @@ function formatTimeDisplay(seconds) {
 
   return `${pad(totalHours)}:${pad(remainingMinutes)}:${pad(remainingSeconds)}`;
 }
+console.log(formatTimeDisplay(61));
 
 // You will need to play computer with this example - use the Python Visualiser https://pythontutor.com/visualize.html#mode=edit
 // to help you answer these questions
@@ -17,18 +18,18 @@ function formatTimeDisplay(seconds) {
 // Questions
 
 // a) When formatTimeDisplay is called how many times will pad be called?
-// =============> write your answer here
+// =============> pad will be called 3 times in total.
 
 // Call formatTimeDisplay with an input of 61, now answer the following:
 
 // b) What is the value assigned to num when pad is called for the first time?
-// =============> write your answer here
+// =============> would be 0 because first call to pad is for totalHours which is 0 when seconds is 61.
 
 // c) What is the return value of pad is called for the first time?
-// =============> write your answer here
+// =============> would be 00.
 
 // d) What is the value assigned to num when pad is called for the last time in this program?  Explain your answer
-// =============> write your answer here
+// =============> The value assigned to num when pad is called for the last time is 1. This is because the last call to pad is for remainingSeconds, and remainingSeconds = 61 % 60 = 1.
 
 // e) What is the return value assigned to num when pad is called for the last time in this program?  Explain your answer
-// =============> write your answer here
+// =============> It would be 01 because the last call to pad is for remainingSeconds which is 01 when seconds is 61.