Question: Please answer and explain ! (5) Suppose (G, *) is a finite group and S is a subset of G. For each a and b

Please answer and explain !

Please answer and explain ! (5) Suppose (G, *) is
(5) Suppose (G, *) is a finite group and S is a subset of G. For each a and b in S, let a * b E S. Show that S is a subgroup of G

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