8. [2pts] Let the set A = {ut, v}. Write down (A), where po means the "power set". 9. (3pts] Let A={3, 5, 7, 8, 9, A, S) and H={x|x is an hexadecimal digit greater than 7). Find a) AUB b) AB c) A-B d) AB e) AUB 10. (3pts] Let A = {a,b,c}, B = {x,y), and C = {5,7}. Find a) AxBxC b) CxBxA c) |BxA 11. [pt] Let the propositional function P be defined as P(x) = "=25" where the domain of x is the set of integers. Write the truth set of P(x). 12. [2pts] Let U be the set of positive integers less than 1000. Answer the following: a) Write the complement of (x1x750 b) What is the cardinality of U