CISC 401/601 assignment 9.

Each exercise is 10 points.

1.  Exercise 2 on page 301.
2.  Exercise 2 on page 307.
3.  CISC 401 students: Exercise 3, parts (a) and (b) on page 319.
    CISC 601 students: Exercise 3, parts (c) and (d) on page 319.
4.  Exercise 4 on page 319.