ntsh For each of the following relations on the integers Z, say whether is an equivalence relation; explain your answer. If is an equivalence relation, give an explicit description of the set of equivalence classes Z/~. a.~y if and only if x > 0 and y > 0. b. xy if and only if |x| = |y|. c. xy if and only if x - y = 2.

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Q: need help

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