Look at the following class declarations and answer the questions that follow them:public...

Look at the following class declarations and answer the questions that follow them:

public class Shape{     private double area;     public void setArea(double a)    {     area = a;    }public double getArea()    {     return area;    }}public class Circle extends Shape  {     private double radius;     public void setRadius(double r)   {     radius = r;     setArea(Math.PI * r * r);   }public double getRadius()    {     return radius;    }}

a) Which class is the superclass? Which class is the subclass?

b) Draw a UML diagram showing the relationship between these two classes.

c) When a Circle object is created, what are its public members?

d) What members of the Shape class are not accessible to the Circle class’s methods?

e) Assume a program has the following declarations:

Shape s = new Shape();Circle c = new Circle();

Indicate whether the following statements are legal or illegal:

c.setRadius(10.0);s.setRadius(10.0);System.out.println(c.getArea());System.out.println(s.getArea());