Al/ Which of these relations on {0, 1 , 2, 3 } are equivalence relations, why? a) R1= {(0, 0), (1, 1), (2, 2), (3 , 3)} b) R2= {(0, 0), (0, 2), (2, 0), (2, 2), (2, 3), (3 , 2), (3, 3)} c) R3= {(0, 0), (1,1), (1, 2), (2, 1 ), (2, 2), (3 , 3)} d) R4= {(0, 0), ( 1 ,1 ), ( 1 , 3), (2, 2), (2, 3), (3 , 1 ), (3 , 2),(3 , 3)} e) R5={(0, 0), (0, 1 ), (0, 2), ( 1 , 0), (1,1), (1,2), (2, 0), (2, 2), (3 , 3)}

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