The universal set is U = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}. If A = {1, 4, 7} and B = {2, 6}, find the following. (Enter your answers as a comma-separated list. Enter EMPTY for the empty set.) (a)    A ∩ B    8          (b)    A ∪ B

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