(4 ma 9) Find the power set of each of these sets, where x, y are distinct elements: (a) {x,y) (b) {x, y, z) (4 mark 10) Let A={a,b,c,d) and B={x,y). Find: (a) Ax B (b) Bx A (4 marks 11) Let A = {1,2,3,4,5) and B={0,3,6). Find: (a) AUB (b) AB (c) A-B (d) B-A of the sets AB and C