Antonio's Big Burger is a small restaurant that sells hamburgers. For Antonio, grills are a fixed input and workers are variable inputs. Assume that labor is Antonio's only variable cost. Antonio has a fixed cost of $80 per day and pays each of his workers $120 per day. Antonio's total product schedule and total cost at each level of labor are presented in the following table.Fill in the blanks to complete the Marginal Physical Product of Labor column for each worker and the Marginal Cost column at each level of labor. When hiring 3 or more workers, Antonio's Big Burger faces _________ marginal returns to labor. Over the range of workers for which the marginal product of labor is decreasing, Antonio's Big Burger faces _____________marginal cost.