Question: 10. Given the set A = {a, b, c, d}. Describe the indicated closure for each of the following binary relations over A. a. r(R),

10. Given the set A = {a, b, c, d}. Describe the indicated closure for each of the following binary relations over A.

a. r(R), where R = {(a, d)}.

b. s(R), where R = {(a, b), (c, d)}.

c. t(R), where R = {(a, b), (d, a), (d, c), (c, b)}.

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