R is the equivalence relation on A = {1,2,3,4,5} defined below. how many subsets do the equivalence classes of partition ? R = {(1,1), (1,3), (1,4), (2,2), (3,1), (3,3), (3,4), (4,1), (4,3), (4,4), (5,5), (2,5), (5,2)}

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