<commit_before>*Self Test short answers*

Questions | Answers
----------|--------
1         | B
2         | B
3         | B, D
4         | A
5         | A
6         | C
7         | A
8         | A<commit_msg>Updating README for chapter 8<commit_after>### Chapter 8: Understanding Polymorphism and Casts

#### Self Test short answers

Questions | Answers
----------|--------
1         | B
2         | B
3         | B, D
4         | A
5         | A
6         | C
7         | A
8         | A
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