The problems suggested here do not even represent a minimum of what you should do, but they are intended to cover most of the major topics. For your own benefit, you should do many additional problems, both similar to and more varied than these, so that you have a good grasp of useful methods. Many students find they do up to half (not just the odd ones) of all those in the book. If you cannot do that, at least attempt to set up as many as possible, so that you can become familiar with thinking about solution techniques. This is extremely important. Suggested problems for Chapter 15: 3, 5, 6, 9, 15, 18, 21, 28, 35, 36, 38, 42. Suggested problems for Chapter 16: 1, 3, 6, 8, 13, 19, 22, 23, 25, 28, 32, 36, 39, 40, 45, 52, 58, 60, 61, 62. Suggested problems for Chapter 17: 3, 4, 10, 11, 14, 21, 19, 25, 30, 33, 35, 36, 40, 47. Suggested problems for Chapter 18: 1, 3, 6, 12, 18, 21, 22, 26, 28, 33, 36, 37. Suggested problems for Chapter 19: 2, 6, 8, 11, 15, 19, 23, 25, 27, 30, 32, 36, 37, 42, 45. Suggested problems for Chapter 20: 1, 5, 7, 13, 14, 17, 21, 22, 23, 28, 33, 34, 36, 38, 40, 45. Suggested problems for Chapter 21: 2, 7, 12, 15, 16, 19, 24, 25, 29, 31, 38, 43, 44, 46, 48, 57, 61. Suggested problems for Chapter 22: 2, 5, 6, 8, 15, 17, 20, 23, 29, 34, 37, 41, 48, 53, 56. Suggested problems for Chapter 23: 2, 3, 6, 13, 15, 18, 23, 25, 27, 28, 32, 35, 40, 43, 51. Suggested problems for Chapter 24.7: 33, 35, 36, 39, 41, 46, 47.