Design an Essay class that extends the GradedActivity class presented in this chapter. The Essay class should determine the grade a student receives for an essay. The student’s essay score can be up to 100 and is determined in the following manner:

Once you have designed the class, design a program that prompts the user to enter the number of points that a student has earned for grammar, spelling, length, and content. Create an Essay object and store this data in the object. Use the object’s methods to get the student’s overall score and grade, and display this data on the screen.

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Grammar: up to 30 points Spelling: up to 20 points Correct length: up to 20 points Content: up to 30 points