Consider the following class declaration:public class Circle{private double radius;public...

Consider the following class declaration:

public class Circle{private double radius;public Circle(double r)    {     radius = r;    }public double getArea()    {     return Math.PI * radius * radius;    }public double getRadius()    {     return radius;    }}

a. Write a toString method for this class. The method should return a string containing the radius and area of the circle.

b. Write an equals method for this class. The method should accept a Circle object as an argument. It should return true if the argument object contains the same data as the calling object, or false otherwise.

c. Write a greaterThan method for this class. The method should accept a Circle object as an argument. It should return true if the argument object has an area that is greater than the area of the calling object, or false otherwise.