System Analysis and Project Management question:

Consider the following classes. In the above diagram, UndergradStudent and GradStudent are sub classes of Student. CheckDean'sList is a method that determines whether a student will be honored as a Dean's List student. The criteria for this determination are different for graduate and undergraduate students. The symbol '-' stands for private and '+" stands for public. In the above diagram, 1) Which attributes are inherited by UndergradStudent? GradStudent? Student? 2) Which methods are inherited by UndergradStudent? GradStudent? Student? 3) Which element in the above diagram is an example of polymorphism? 4) What is the interface for student