4. Consider the relations R = {(1,2), (2, 3), (3, 1)} and S= {(2,1), (3, 2), (1,3)} on the set A = {1,2, 3}. a) Show that R is not an equivalence relation. b) Show that S is not an equivalence relation. c) Find the zero-one matrix representations Mg and Ms for R and S respectively.

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