Prove each of the following statements using strong induction. For each statement, answer the following questions.

a. (4/2 pt.) Complete the basis step of the proof by showing that the base cases are true.

b. (4/2 pt.) What is the inductive hypothesis?

c. (4/2 pt.) What do you need to show in the inductive step of the proof?

d. (8/4 pt.) Complete the inductive step of the proof.

3. (10 pt.) Prove that any amount of postage worth 18 cents or 4-cent stamps and 7-cent stamps. more can be formed using only