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Table 181 Number of Marginal Product Value of Marginal Marginal of Labour Product of Labour Wage Profit $1000 $500 $500 2 80 $800 $500 3 60 $500 $100 4 280 $400 $500 5 20 $500 Refer to Table 18-1. What is the fourth worker's contribution to total revenue? O a. $400 O b. $300 O c. -$200 O d. $800Firms in industries that have competitors but, at the same time, do not face so much competition that they are price takers, are operating in either of which types of markets? O a. oligopoly or monopoly market O b. oligopoly or monopolistically competitive market O c. monopoly or monopolistically competitive market O d. oligopoly or perfectly competitive marketFirms do not need to be concerned about striking a balance between the price effect and the output effect when making production decisions in which type of markets? O a. duopolies O b. monopolies O c. competitive markets O d. oligopoliesFrom which source do provincial and local governments NOT generate revenue? O a. the federal government O b. sales taxes O c. customs duties O d. corporate income taxes\fRefer to Table 17-2. If there is only one wireless internet company in this market, what price would it charge for a wireless Internet subscription to maximize its profit? O a. $90 O b. $150 O c. $120 O d. $60