Notes on the Exercises 2.1, 2.5, 2.9, 2.13, and 2.14

• See loop-lab-test.scm for test expressions and their values.

• For Exercise 2.1, your procedure should have the form (power base exponent).

• For Exercise 2.5, the integers being multiplied can be positive or negative.

• Exercise 2.9 is in two parts. (a) In the first part, call your procedure num-sixes, which takes a single integer argument n. (b) In the second part, call your procedure num-digits, which takes two integer arguments n and d. For either part, n can be negative.

• The behavior for Exercises 2.13 and 2.14 is described in comments in the test file.