====== Homework 5 ======
//Out: 8 Jan 2009, Due: 14 Jan 2009//

  - Exercise 3.1 (a,c,d).
  - Exercise 3.8 b.  (You must explain how to implement each step in the higher-level description.)
  - Problem 3.9.
  - Problem 3.10.
  - Problem 3.12.