Let R1 and R2 be the relations on {1, 2, 3, 4} given by
R1 = {(1, 1), (1,2), (3,4), (4, 2)}
R2 = {(1, 1), (2, 1), (3, 1), (4. 4), (2, 2)}.
List the elements ot R1 o R2 and R2 o R1.
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