Need assistance creating J-Unit Tests

Work must be original. Using the JUnit framework, you will write test class(es) to test the observer and subject (observable) classes. You should test all the methods of each class and use different test tags (@test, @beforeeach, etc.). You should also use different input values (whenever possible) when testing the methods. Additionally, include a coverage report showing that your program is covered by at least 75% of your test code. A coverage report can be generated automatically by the JUnit framework.

More instructions in attached word file and pdf file