[Learners] Solve Activity 4: Let's see how well a country itself is

[Kevinpaulose05]

MicroByte Title: COVID-19 Visualization using Pandas and Matplotlib

Improvement Proposal:

• Solve activity 4 by updating the code properly, preferably first by using my approach. Then you may and I suggest should improvise.

Benefits of proposed improvements:

• Learners will learn how to use pandas to manipulate data and use matplotlib to visualise that data(using bar charts this time) in a much vivid way.