Course Grades
In a course, a teacher gives the following tests and assignments:
● A lab activity that is observed by the teacher and assigned a numeric score.
● A pass/fail exam that has 10 questions. The minimum passing score is 70.
● An essay that is assigned a numeric score.
● A final exam that has 50 questions.
Write a class named CourseGrades. The class should have a GradedActivity array named grades as a fi eld. The array should have four elements, one for each of the assignments previously described. The class should have the following methods:
setLab: This method should accept a GradedActivity object as its argument. This object should already hold the student’s score for the lab activity. Element 0 of the grades fi eld should reference this object.
setPassFailExam: This method should accept a PassFailExam object as its argument. This object should already hold the student’s score for the pass/fail exam. Element 1 of the grades fi eld should reference this object.
setEssay: This method should accept an Essay object as its argument. (See Programming Challenge 4 for the Essay class. If you have not completed Programming Challenge 4, use a GradedActivity object instead.) This object should already hold the student’s score for the essay. Element 2 of the grades fi eld should reference this object.
setFinalExam: This method should accept a FinalExam object as its argument. This object should already hold the student’s score for the fi nal exam. Element 3 of the grades fi eld should reference this object.
toString: This method should return a string that contains the numeric scores and grades for each element in the grades array.
Demonstrate the class in a program.
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