2.7 10, 41
3.1 17, 37, 52
3.2 none, 41, 48
3.3 7, 33
3.4 5, 28, 48
no problems match with our 2.6 homework
3.5 29, 44, 73, 80
3.6 28, 55, 62
3.7 none, 2, 6, none, none
3.7 none, none, 31, 99
3.8 53, 65, 79, 93, 97
3.9 12, 22, 31
3.10 3, 6, 10, 18, 55, 70