Quiz for your benefit.  No contribution to final grade.

I got 4 submissions for peer review and saw 1 review.
I sent feedback to the 4 submissions.
I posted code and description of the solution.

The lesson:

1. Send quiz/exam by email, not show on screen (me).
2. Please type solution, not a picture of hand notes.
3. Dont change names.
4. Solution is short, consider single file (you).
5. Answer the questions.
6. Dont add fluff.
7. Take advantage of others (peers).

Elements (vary, but some typical):

1. interfaces, classes, objects
2. relations: inheritance, delegation, other
3. key methods signature
4. key methods calls