Create a housing application for a property manager. Include a base class named Housing. Include data characteristics such as address and year built. Include a virtual method that returns the total projected rental amount. Define an interface named IUnits that has a method that returns the number of units. The MultiUnit class should implement this interface. Create subclasses of MultiUnit and SingleFamily. Single-

Family should include characteristics such as size in square feet and availability of garage. MultiUnit might include characteristics such as the number of units. Create .DLL components for the housing classes.

Define a presentation class to test your design.