Define the difference of sets X and Y. How is the difference denoted? Define the Cartesian product of the sets X_1, X_2, .., X_n. How is this Cartesian product denoted? In Exercises 1-16, let the universe be the set U = {1, 2, 3 .., 10}. Let A = {1, 4, 7, 10}, B = {1, 2, 3, 4, 5}, and C = {2, 4, 6, 8}. List the elements of each set. A Union B B Intersection C A - B B - A A U - C U A Union B Intersection A Union U B Intersection U A Intersection (B Union C) B Intersection (C - A) (A Intersection B) - C A Intersection B Union C (A Union B) - (C - B) What is the cardinality of ? What is the cardinality of { }? What is the cardinality of {a, b, a, c}? What is the cardinality of {{a}, {a, b}, {a, c}, a, b}? In Exercises 21-24, show, as in Examples 1.1.2 and 1.1.3, that A = B A = {3, 2, 1}, B = {1, 2, 3} C = {1, 2, 3}, D = {2, 3, 4}, A = {2, 3}, B = C Intersection D A = {1, 2, 3}, B = {n | n elementof Z^+ and n^2