Define a public class named Points. It should have a public instance method named score and a second named penalty, both taking a single int argument. score adds the passed number of points to the score, while penalty removes the passed number of points from the score. Both functions should return the new score after the change is completed. Your class should also provide a constructor taking a single int argument that sets the initial score.

Note that your Points class should not allow modifications to the score except using the score and penalty methods.

So when you are finished your class should work as follows: