Please test all your programs carefully and include all the test cases
with your program. You must have at least 3 check-expect tests for each expression and function that takes different data.
Exercises 2 (1 pt), 3 (3 pts), 4 (3 pts), 8 (5 pts) in Ch. 1. In exercise 8 it's fine to implement just tall and wide, and not square.
Exercises 12 (5 pts) (define csurface as well), 13 (3 pts), 14 (3 pts), 17 (4 pts), 18 (4 pts), 19 (4 pts) in Section 2.1 In exercise 17 it's fine to implement just tall and wide, and not square.