Please test all your programs carefully and include all the test cases
with your program. You should have at least 3 tests for each
program. They can be just expressions testing your code or your
function, but it's much better to write them
using check-expect.
Exercises 2 (1 pt), 3 (3 pts), 4 (3 pts), 10 (5 pts) in Ch. 1
Exercises 14 (5 pts, define cube-surface as well), 15 (3 pts), 16 (3 pts), 19 (4 pts), 21 (4 pts), 22 (4 pts) in Section 2.1