b$)$ A manager makes the statement that output should be expanded as long as average revenue exceeds average cost. Does this strategy make sense? Explain $(5$marks$)$c$)$ Two months ago, the owner of a car dealership changed his sales manager's compensation plan. Under the old plan, the manager was paid a salary of K$6,000$ per month; under the new plan, she receives $2$ percent of the sales price of each car sold. During the past two months, the number of cars sold increased by $40$ percent, but the dealership's margins $($and profits$)$ significantly declined. According to the sales manager, "Consumers are