$68.$Write a class encapsulating the concept of a circle, assuming a circle has the following

attributes: a Point representing the center of the circle, and an integer, the radius of the circle.

Include a constructor, the accessors and mutators, and methods toString and equals. Also include

methods returning the perimeter $(2*\backslash$pi $*$ radius$)$ and area $(\backslash$pi $*$ radius$2$

$)$ of the circle. Write a client

class to test all the methods in your class.