Chapter 5, Problem 15PE

Test Average and Grade

Write a program that asks the user to enter five test scores. The program should display a letter grade for each score and the average test score Write the following functions in the program:

▪ calc_average. This function should accept five test scores as arguments and return the average of the scores.

▪ determine_grade. This function should accept a test score as an argument and return a letter grade for the score based on the following grading scale:

Score	Letter Grade
90-100	A
80-89	B
70-79	C
60-69	D
Below 60	F