(5 pts) Use the set-roster notation to indicate the elements in the set {n Z | n is a factor of 9}. 2. (5 pts) True-False: {0}=0 3. (5 pts) {5} {1, 3, 5} 4. (5 pts) {5} {1, 3, 5} 5. (5 pts) {5} {{1}, {3}, {5}} 6. (5 pts) True-False: Let A = {1,2,3}, B = {3,1,2}, and C = {1,1,2,3,3,3} A B 7. (5 pts) True-False: Let A = {1,2,3}, B = {3,1,2}, and C = {1,1,2,3,3,3} A C 8. (5 pts) How many elements are in the set {1, {1}}?