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The following three relations are defined on the set of natural numbers :R = {(x, y) : x < y, x ∈ N, y ∈ N}S = { (x,y) : x + y = 10, x ∈ N, y ∈ N}T = { (x, y) : x = y or x – y = 1, x ∈ N, y ∈ N } Explain clearly which of the above relations are (i) Reflexive (ii) Symmetric (iii) Transitive.