Design an essay class that extends the gradedactivity class presented in this chapter. theessay class should determine the grade a student receives for an essay. the student's essaystore can be up to 100 and is determined in the following manner: grammar: .10 pointsspelling: 20 pointscorrect length: 20 pointscontent: 30 pointsdemonstrate the class in a simple program. be sure that0 < = grammar < = 300 < = spelling < = 200 < = correct length < = 200 < = content < = 30if a value is outside its proper range then display an informative error message. set the value to its minimum allowed value if the given is below zero. set the value to its maximum value if the given value is above the maximum allowed. the essay class extends the gradedactivity.