Now that you have solved the problem of knowing which Subject notified the Observer, your task is to create a basic Java implementation of the Observer Pattern with this fix. You must create an...

Now that you have solved the problem of knowing which Subject notified the Observer, your task is to create a basic Java implementation of the Observer Pattern with this fix. You must create an interface for both the Subject and Observer interfaces as described in your solution to question 3.

You must then create two concrete classes that implement these interfaces. The class that implements the observer should simply print to console when they are notified of changes. You must the create a basic driver program to demonstrate that your Subject and Observer implementations work and are consistent with the specification.