A. From Exercises 7.1 on page 560 of the Book: 5, 13, 15, 18, 32, 35, 41, 48, 49, 55, 59, 65
B. From Exercises 7.2 on page 567 of the Book: 1, 8, 11, 23, 25, 29, 31
C. From Exercises 7.3 on page 576 of the Book: 1, 3, 6, 7, 13, 17, 23, 25, 31, 35, 40, 41