4. Find the power set of each of the following sets. (a) A= {2,6, r} (b) A = {a, {a, b} ,b} %3D (c) 0 (d) B = {0} 1 (e) C = {0, {0}}. 5. Draw a Venn diagram and decide whether each conjecture is false. If the statement is false, give a counterexample suggested by the Venn diagram. (a) AU(BnC) = (An B)UC (b) (AUB) = An B". (c) (A - D)U (B- D) C (AU B)- D. 6. Let A, B, and D be arbitrary stes. Write each of the following sets in terms of A. B, and D and the operations U, and complement.