Question 7. Let A = {p, q, r, s ), B = {r, t, v), and C= (p, s, t, u) be subsets of S = (p, q, r, s, t, u, V, w). Find each of the following: (2 points) B C = 3 points) B-A= 3 points) = . (3 points)I A x BI= Question 8. (3 points) Give a general formula for IDUET, where D and E are sets. Question 9. Define each of the following terms using sel builder notation. (3 points) D x E= { 1 (3 points) D - E= { Question 10. (3 points) For each of the following, determine if it is a function or not. (b) AN 4 Is it a function? Is it a function? Is it a function? Question 11. Define each of the following terms that are associated with functions. (2 points) onto (2 points) one-to-one