9. List the ordered pairs in the equivalence relation on A = {1, 2, 3, 4, 5} associated with these partitions: ★ (a) {{1, 2},{3, 4, 5}} (c) {{2, 3, 4, 5}, {1}} (b) (d) {{1}, {2}, {3,4}, {5}} {{1,5}, {2,4}, {3}}

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