The table displays data for 2019 where a small, competitive, profit-maximizing firm produces and sells hand sanitizer. Assume that labor is the only input that varies for the firm.   Labor (Number of workers) Marginal Product of Labor (Bottles of hand sanitizer per week) Wage (Dollars per worker per week) 0 1 147 448 2 123 448 3 105 448 4 95 448 5 90 448 Refer to Table for each question. Suppose the firm sells each bottle of hand sanitizer that it produces for $4.   a. What is the value of marginal product of labor for the third worker? Answer:420 b. What is the marginal profit of the third worker? Answer: [ Select ] $-28 $68 $420 –$68 c. How many workers should the firm hire? Answer: [ Select ] 2 3 4 5 d. The firm would not be interested in hiring a third worker unless the wage fell from its current level of $448 to what level? Answer: $420    多重下拉选择题