Calc 4 HW 3

Part 1 of HW 3: 15.6 exercises 9, 21.

Part 2 of HW 3: 15.7 exercises 17, 31.

Part 3 of HW 3: 15.8 exercises 13,21.

Part 4 of HW 3: 15.8 exercises 27, 29.