Let U = {2, 4, 6, 8, 10, 12, 14, 16, 18, 20]. A. ) Give an example to illustrate the fact: "If U = A U B and An B = 0, it always follows that A = U - B." B. ) Suppose C = [2, 6] and D = [4, 6, 10, 12, 18, 20]. List the elements of D - C, D O C, and C3. C. ) If E = {8, 16], find E x P(E)