Create an abstract class called Building. The class should have private int fields to store the

building$$s height and width. These variables should be initialized by the constructor. Height and width are measured in characters Add methods getHeight$()$ and getWidth$()$ that return the values of the private fields.

Add an abstract method getLevel that returns String and takes an int parameter. In subclasses,

this method will return a string representing one level of the building.

Add a toString$()$ method that uses getLevel to produce a string representing the building