The diagram below shows the demand curve, marginal revenue curve, and cost curves for a monopolist that owns the only golf course on Eagle Island. The mon¬opolist's product is 18-hole golf games.

a. What is the profit-maximizing price and output (number of rounds of golf per week) for the monopolist on Eagle Island?
b. What is the average total cost per round of golf at the profit-maximizing level of output?
c. Calculate the profit, in dollars per week, to this monopolist.