Question: (a) Calculate A B C for A = {1, 2, 3, 5}, B = {1, 2, 4, 6}, C = {1, 3, 4, 7}. Note

(a) Calculate A B C for A = {1, 2, 3, 5}, B = {1, 2, 4, 6}, C = {1, 3, 4, 7}.

Note that the symmetric difference operation is associative: (A B) C = A (B C).

(b) Let A, B, and C be any finite sets. Give a concise description for which elements from A, B, and C are in A B C.

(c) Let A1, A2, , An be any finite sets. Give a concise description for which elements from A1, A2, , An are in A1 A2 An

(d) Give an example showing that subtraction is not associative: A - (B - C) (A - B) - C.

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