Let A = {1,2,3,4, 5, 6} and let R be an equivalence relation on A. Suppose that 1R2, 3R5 and 6R3. Also assume R has 3 equivalence classes, no equivalence class has 4 members, and [4] has only one member. Determine the equivalence classes of R. (Hint: it may help to draw the digraph representation of R.)

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A: Equivalence relation

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A: I have solved both subpart using basic definition of equivalence relation and equivalence class.