Problem 1

Write a program in python that computes the average of 5 scores that enter by the users; the program must meet the following requirements:

1. Write a function named calc_average that returns an average of 5 scores.Now write a function named Quadratic that evaluates the following polynomial and returns the answer.
2. Write a function named select_grade that receives a numeric grade and returns the corresponding letter grade as following:

• 90 and up = A
• 80 and up = B
• 70 and up = C
• 60 and up = D
• 59 and below = F