Please refer to the background information below to answer the following six questions. Two firms, X and Y, have access to seven different production processes, each one of which has a different cost (dollars) and gives off a different amount of pollution (tons). The information is summarized in the table below. Process (daily smoke) Cost to Firm X Cost to Firm Y A (6 tons) 80 330 B (5 tons 210 720 C (4 tons) 420 1180 D (3 tons) 710 1750 E (2 tons 1080 2450 F (1 tons) 1530 3380 G (0 tons 2080 4480 23. If pollution is unregulated, and negotiation between the firms and their victims is impossible, firm X will use the production process [ Answer23A ], firm Y will use the production process [ Answer23B , and the total smoke emitted will be [ Answer23C ] tons per day. 24. Suppose the city council set a tax of 295 dollars on each ton of smoke emitted each day. We would expect the firms will emit a total of [ Answer24 ] tons of smoke per day. 25. Suppose initially there is no regulation on pollution (in particular, no tax is imposed on pollution), and the city council has recently decided to cut the total pollution (smoke emissions) by half. If the city council requires each firm to cut its emission by half, the total cost of reducing the emssion to the society will be [ Answer25 ] dollars per day. 26. Continue to assume that the city council wants to cut total smoke emissions by half. Suppose the city council like to set a tax of T dollars on each ton of smoke emitted each day. To achieve the desired reduction in emission, the T should be more than [ Answer26A ] and less than [ Answer26B ]. 27. Continue from the previous question. Using tax as a tool, the total cost of reducing the emission to the society is [ Answer27 ] dollars per day. 28. From the society's perspective, to cut the emission by half, it would be optimal for firm X to adopt process [ Answer28A ] and firm Y to adopt process [ Answer28B ]