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(a) Is 2 = {2,4,6}? (b) Is {3} = {1, 3, 5}? Fill in the blanks: a. Given sets A and B, to prove that (A - B) U (A n B) SA, we suppose that xe we must show that xe, and b. By definition of union, to say that x (A-B) U (An B) means that Let X = {I EZ || = 5a + 2 for some integer a}, Y = {m EZ | m = 4b + 3 for some integer b}, and Z = {n e Zn = 4c - 1 for some integer c}. a. Is X CY? b. Is Y CZ? Disprove the following statement by finding a counterexample. For all sets A, B, and C, AU (BOC) S (AUB) n C