Write an inheritance hierarchy for classes Quadrilateral, Trapezoid, Parallelogram, Rectangle and Square. Use Quadrilateral as the superclass of the hierarchy. You are being provided with a Point class, use it to represent the points in each shape. For e.g. the private instance variables of Quadrilateral should be the x-y coordinate pairs for the four endpoints of the Quadrilateral. Write a program that instantiates objects of your classes and outputs each objects area (except Quadrilateral).

Quadrilateral: Data: Point topLeft, topRight, bottomLeft, bottomRight; Methods: Constructors, getters, setters, toString All derived classes: Each derived class must have its own instance data like side for Square, length & width for Rectange and so on. Methods: Constructors, setters, getters, to String, get Area()

// this is the provided Point class

public class Point

{

//x,y coordinates for a point

private int x;

private int y;

//Constructors

public Point()

{

x = 0;

y = 0;

}

public Point(int x, int y)

{

this.x = x;

this.y = y;

}

public int getX()

{

return x;

}

public int getY()

{

return y;

}

public void setX(int x)

{

this.x = x;

}

public void setY(int y)

{

this.y = y;

}

public String toString()

{

return "x is: " + x + ", y is: " + y;

}

}