I completed two of the challenges at the end of Chapter 5. (or at least I hope I did)
I also fixed some formatting issues.
The challenges were:
- Users can rotate CheatActivity after they cheat to clear out the
  cheating result

- Once they get back, users can rotate QuizActivity(HelloScaloid) to clear out
  mIsCheater

The last challenge yet to be completed:
- Users can press Next until the question they cheated on comes back
  around