Please explain all steps

6. Write a Java 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. The program must have two classes ScoreGrade and ScoreGradeDrive classes. Write the following methods in the ScoreGrade class: calcAverage This method should accept five test scores as arguments and return the average of the scores. determine GradeThis method should accept a test score as an argument and return a letter grade for the score, based on the following grading scale: Score 90-100 8089 7079 60-69 Below 60 Letter Grade A B D F The ScoreGradeDrive class reads five test scores entered by the user, calls appropriate methods in the ScoreGrade class, and displays a letter grade for each score and the average test score. (5 pts)