Given a = {(1, , 5)(6, 4)}, b = {(2, 0)(4, , 5)(0, 0)} and c = {(1, 1)(0, 2)(0, 3)(0, , 5)}, answer the following multiple choice question:

from the list of sets a, b, and c, state the domain and range of set b.

1. domain of set b: {0, 6, 5}
2. domain of set b: {2, 4, -4, 0}
3. set b does not have a domain