Use a text processing system (e.g., latex, troff, frame) to answer the following questions. Some of them are Practice problems. Try to do them without looking at the solutions in the book.

1. Problem 5.6, pg 422.
2. Problem 5.7, pg 428.
3. Problem 5.8, pg 436.
4. Problem 5.13, pg 447.
5. Problem 5.19 pg 450.
6. Problem 9.3, pg 661.
7. Problem 9.4, pg 661.