. How can you determine what types a class can be typecast to?

10. If you have two classes, Mammal and Dog, which one should be the superclass?

11. Explain the difference between private, protected, and public variables/methods.

12. How does Java search for a method when it is called by a class (e.g., what classes does it look in)?

13. What is the role of an interface in OOP? What is an advantage of using interfaces in your class design?

14. What does it mean for a class to be abstract? What does it mean for a class to be concrete?