Chapter 6, Problem 7PE

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. Design the following functions in the program:

• calcAverage—This function should accept five test scores as arguments and return the average of the scores.
• determineGrade—This function should accept a test score as an argument and return a letter grade for the score (as a String), based on the following grading scale:

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