(Sum the areas of geometric objects) Write a method that sums the areas of all the geome...

(Sum the areas of geometric objects) Write a method that sums the areas of all the geometric objects in an array. The method signature is:

public static double sumArea(GeometricObject[] a)

Write a test program that creates an array of four objects (two circles and two rectangles) and computes their total area using the sumArea method.

Draw the UML diagram that involves Octagon, GeometricObject, Comparable, and Cloneable. Write a test program that creates an Octagon object with side value 5 and displays its area and perimeter. Create a new object using the clone method and compare the two objects using the compareTo method.