75 Answer all the questions: B1. Given the following classes, answer the below questions. 1. Person (abstract class) that has the following: Data Fields: private

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75 Answer all the questions: B1. Given the following classes, answer the below questions. 1. Person (abstract class) that has the following: Data Fields: private String name, private String address Constructor: Constructor to create a Person object with specified name and address Methods: Accessor and mutator methods for all data fields. 2. Student (extend the class Person) that has the following: Data Fields: private int ID, private double grade Constructor: Constructor to create a Student object with specified name, address, ID & grade. Methods: Accessor and mutator methods for all data fields. 3. Director (extend the class Person) that has the following: Data Fields: private double salary Constructor: Constructor to create a Director object with specified name, address, and salary. Methods: Accessor and mutator methods for salary data fidd. 4. Graduate Student(extend the class Student) that has the following: Data Fields: - Constructor: Constructor to create a Graduate Student object with specified name, address, ID and grade Methods:- & Design UML diagram for the above classes. Write the code only for class Person and Class Student