Extend the definition of AbstractExample to enforce the immutable object pattern using AbstractProperty as an example. . Complete the implementation for the credit risk example. This will involve...

Extend the definition of AbstractExample to enforce the immutable object pattern using AbstractProperty as an example. . Complete the implementation for the credit risk example. This will involve creating subclasses of AbstractProperty for each property, and an appropriate subclass of AbstractExample. Also, write a class and methods to test your code.