ble: Production of Bagels Number of Workers Per Period Thousands of Bagels Per Period 0 0 1 5 2 15 3 30 4 42 5 51 6 57 7 60 8 50 9 57 Reference: Ref 11-8 Table: Production of Bagels (Table: Production of Bagels) Use Table: Production of Bagels. Diminishing marginal returns begin with the addition of the _____ worker. Question 1 options: fifth sixth fourth third