Question: Write an abstract superclass encapsulating a shape: A shape has two abstract methods: one returning the perimeter of the shape, another returning the area of

Write an abstract superclass encapsulating a shape: A shape has two abstract methods: one returning the perimeter of the shape, another returning the area of the shape. It also has a constant field named PI. This class has two non-abstract subclasses: one encapsulating a circle, and the other encapsulating a rectangle. A circle has one additional attribute, its radius. A rectangle has two additional attributes, its width and height. You also need to include a client class to test these two classes.

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