Programming problem (Python)

Instructions pictured below:

rogram Specifications: - Allows the user to enter as many letter grades as they wish - Account for uppercase and lowercase letters - Properly calculate GPA average based on course letter grades and number of courses - You can assume that each course is worth equal credit hours for simplicity, although you may implen functionality to account for courses with differing credit hours if you desire. - Display the GPA average to user - Format the output so that it is limited to no more than 3 decimal places - Code should be well-formatted and properly commented - If you cannot look at your code the next day and understand what it does, it needs more comments - The code must be void of any syntax errors and should run