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Show that each of the relation R in the set A = {x ∈ Z : 0 ≤ x ≤ 12 }, given by
(i) R = {(a, b) : | a – b | is a multiple of 4 }(ii) R = {(a, b) : a = b} is an equivalence relation. Find the set of all elements related to 1 in each case.
