Problem
Create class Cube. The class has attributes length and width and depth, each of which defaults to 1. It has read-only properties that calculate the Perimeter and the Area for a side of the cube, and another that calculates the cubed feet for the cube. (You will have to research how to do that calculation online) It has properties for length and width and depth. The set accessors should verify that length and width and depth are all floating-point numbers greater than 0.0 and less than 20.0. Write app to test class Cube by creating 3 cubes of different sizes.