two firms, sludge oil and northwest lumber, have access to five production processes, each one of which has a different cost and gives off a different amount of pollution. the daily costs of the processes and the corresponding number of tons of smoke emitted are as shown in the following table: process (smoke)a (4 tons/day)b (3 tons/day)c (2 tons/day)d (1 ton/day)e (0 tons/day)cost to sludge oil ($/day)5070120200500cost to northwest lumber ($/day)1001805001,0002,000a. if pollution is unregulated, and the firms have no incentive to reduce pollution, which process will each firm use, and what will be the total daily smoke emission?