The following chart provides information for Harry's Hammers, a competitive firm that uses labour as the only variable input to produce hammers. Number of workers Total output of hammers 8 18 30 44 57 JOUId 68 77 a) If the firm hires 4 workers, what is the average product of labour? b) What is the marginal product associated with the 5th worker? c) After which quantity of output does marginal cost start increasing? How do you know? d) If the hammer sells for $5 each, and the market wage rate is $50 per worker, how many workers should this firm hire? Why? e) Another firm, Hyman's Hammers, has marginal product of labour function MPL = 20-2L. With the same hammer price and wage rate as in part (d), how many workers should Hyman's Hammers hire? Show your calculation for full mark. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac)