Define a class for the student record. the class should instance variables for quizzes, midterm, final and total score for the course and final letter grade. the class should have input and output methods. the input method should not ask for the final numeric grade, nor should it ask for final letter grade. the classes should have methods to compute the overall numeric grade and the final letter grade. these two methods will be void methods that set the appropriate instance variables. your program should use all the described methods. you should have set of accessor(getter) and mutator(setter) methods for all instance variables, whether your program uses them or not. the program should read in the students’ scores two quizzes, midterm and final and display the student’s records, which consists of all the above +final number and final letter grade. overall numeric grade is calculated as 50%-final exam, 25%-midterm and two quizzes together count for 25%. for letter grade 90-100 is a 80-89 is b 70-79 is c 60-69 is d and any grade < 60 is f grade when taking input, quiz grades are out of 10 points and midterm and final are out of 100 points