Hints for Assignment A

1. Here's the solution to Exercise 1.12. The global maximum is 6 feet (at 9 a.m. on February 13) and the global minimum is 1 foot (just before 5 p.m.).
   

2. If a join is invertible, then each component of the inverse is the inverse of the corresponding component of the original function. So invert each component separately, then join them. This is very similar to Exercise 2.11, whose solution is on the previous page (under Supplementary Solutions).

3. This is very similar to Exercise 3.3, whose solution is in the course pack.

4. This is very similar to Exercise 4.10, whose solution is in the course pack.