Question: Complete Table 2.27 so as to define a commutative binary operation * on S = {a, b, c, d}. 2.27 Table * D b C

Complete Table 2.27 so as to define a commutative binary operation * on S = {a, b, c, d}.

2.27 Table * D b C a b b C dd d

2.27 Table * D b C a b b C dd d D d C b a

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