13. Let A be the set A = {a, b, c, d}. Consider the relation R on A given by R = {(a, a), (b, b), (c, c), (d, d)} (a) Draw the directed graph representing R. (b) Is R reflexive? Justify your answer. (c) Is R symmetric? Justify your answer.

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A: Given:

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A: NOTE: Refresh your page if you can't see any equations. . given vectors are

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