Phase $1$:

Write a class representing a $2$D point.

Have the class consist of two fields representing it's coordinate, ideally x and y$.$

Let the fields $($data members$)$ be public, but make sure that they don't fall victims to immutability so set the fields to be constant.

Write a method $($function members$)$ that finds the distance from one point to the other.

Write a method that finds the slope given another point.

Phase $2$

Using only instances of the point class, write a class representing a circle object. Let hte fields be public, but make sure that thy don't fall victims to immutability so set the fields to be constant. Provide an area and a perimeter method $($function member$)$

Phase $3$

Using only instances of the circle class write a sphere class. Let the fields $($data members$)$ be public, but make sure that they don't fall victims to imuutability so set the fields to be constant. Provide a volume and surface area method $($function member$)$