Problem
Suppose you are given the .class file and the following API page for the Point class.
Design a class called Circle that has the following private instance variables: center (of type Point) and radius (of type double).
Write the following instance methods for the Circle class:
1) A constructor that accepts two parameters, a Point and a double
2) A method called enlarge that adds 1 to the Circle's radius
3) A method called distance that returns the distance between the center of one Circle
object to the center of another Circle object
4) A method called getArea that returns the area of a Circl.