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Let A = { a, b, c, d, e ). Consider the equivalence relation R on A: [ (c. d), (a, e), (a, a), (b. b), (d, c), (c. c), (e, a), (d, d), (e, e) }. What is the partition defined by the equivalence relation R? O{c. b, e}, {d, a) O [c, d], [a, e], O{c. b), (d, a}, {e}