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Nimbus, Inc., makes brooms and then sells them door-to-door. Here is the relationship between the number of workers and Nimbus's output in a given day. Marginal Workers Output Product 0 0 20 2 50 3 90 4 120 5 140 6 150 155 After which worker does marginal product begin diminishing? O 2nd 3rd 4th O 5th