Consider the following class:class Student {private String name ;public void setName ( String n) {name = n; }public String getName () {return name ; }public Student ( String n) {setName (n); }}(a)    ( 8 marks ) Extend class Student to class ResearchStudent by adding a data member gpa (standing for grade point average). Marks will be awarded based on correctness of class header, data member and type, getter and setter and parameterized constructor using super keyword.(b)   (2 marks) Declare a Student object referenced be myStudent and use run-time polymorphism with ResearchStudent whose name is “Robin”, gpa is 3.

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