hello all I am writing a program that want me to create a students grade record in csv files, for 3 students 3exams. this was easy.

The second part is what I am struggling with. The question is how do I amend the program to add the average grades and display the grades in a tabular form.

My second question is also how to modify an already created program, and write the output to a text file by using a list. for example using 2 and followed by 3 I am trying to modify a telephone number.

Thank you all for your help