4. Find the power set of each of these sets, where a and b are distinct elements. ( 3 points) a. {a,b}. b. {,{}} 4. Let A={a,b} and B={1,2,3,4,5}. Find ( 3 points) a. AB. b. A3. 5. Let U={1,23,4,5,6,7,8,9,10},A={1,2,3,4,5,6},B={1,3,6,9}, and C={3,5,7,8,9}. Find ( 3 points) a. A'nB'. b. AB. c. (AB)C. 6. Draw the Venn diagrams for each of these combinations of the sets A, B, and C. (3 points) a. (AB)C b. (AB)(AC)