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A, B and C are subsets of universal set U. If `A = {2,4,6,8,12,20}`, `B = (3,6,9,12,15},
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A, B and C are subsets of universal set U. If `A = {2,4,6,8,12,20}`, `B = (3,6,9,12,15}, C = {5,10,15,20}` and U is the set of all whole numbers, draw a Venn diagram showing the relation of U, A, B and C.