Consecutive integers are integers that follow each other, but since we're looking at consecutive odd integers, it'd be 1, 3, 5, 7, 9, etc.
a. 33
33/3 = 11
11 would be your middle integer
_, 11, _
9,11,13
9 + 11 + 13 = 33
b. 45
45/3 = 15
13,15,17
13 + 15 + 17 = 45
c. 159
159/3 = 53
51,53,55
51 + 53 + 55 = 159
using this, you should be able to figure the rest out