8. If A = {1, 2, 3}and B = {4, 5, 6}, then what is A n B?
a. {1,2,3,4,5,6) b. {1,2,3)
C. (4,5,6) d{ }

9. If A = {1, 2, 3, 4, 5, 6, 7} and B = (5, 6, 7, 8, 9, 10), then what is A U B?
a. (5,6,7) b. {1,2,3,4)
C. (1,2,3,4,5,6,7,8,9,10) d. (8,9,10)

10. If A = {T, W, R} and B = {M, T, W}, what is A - B?
a. {R} b. {M}
c. {W} d. {T} ​