Answer the following questions based on the following Rectangle class:

public class Rectangle

{

private int length;

private int width;

public Rectangle(int length, int width)

{

this.length = length;

this.width = width;

}

public int area()

{

return length * width;

}

)

a) Write a class Cube:

-It should inherit from Rectangle

-It should have one instance variable for height

-It should have one constructor that takes 3 parameters (length, width, and height)

-You should NOT include any other methods or instance variables

b) Write the toString method for Rectangle if length is 3 and width is 2, it should return 3 x 2

c) Write a volume method for Cube that uses the area method in the Rectangle class

d) Explain why I made the instance variables (length and width) in Rectangle private instead of public