Math help plz!! Just need answer : explanation

5. Identify the pair below that are sets and are equal: a. A = (1, 2, 3, 4, 5); B - (a, e, i, o, u) b. A - (1, 2, 3, 4, 5); B = (4, 3, 2, 5, 1 } C. A - (1, 2); B= (1, 0) d. A = Q; B = (0) 6. What is the cardinality of the empty set? What is n (0)? Or n ({ })? d. n (0) = 0 a. n (0) - 2 b. n (0) = 1 c. N (@) Cannot be determined SUBSETS: 7. Given that set A = {a, b, c, d, e, f, g}, which of the following is not a proper subset of set A? a. B = {a, c, d, f, e, g) ; W T b. C = {a, b, c) ; c. D = {0} d. E = {a, b, c, g, d, e, f } 8. Given that set A = fa, e, i, o, u} . How many proper subsets can be formed? a. 32 b. 31 C. 63 d. 7 9. The Formula for the cardinal Number of the Union of two finite sets A & B is: n (A U B) = n (A) + n (B) - n (An B) In a survey of students who are willing to pick up trash and students who willing to serve dinner in a community service project, 495 students indicated that they will pick up trash, and 342 students said they will serve dinner to the homeless, 120 students indicated they will pick up trash and serve dinner to the homeless. How many students were willing to pick up trash or serve dinner? a. 490 b. 340 c. 717 d. 120