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Served Help Save & Exit Graph shows the cost and revenue information for Shitotsu the monopolist. What are the levels of price, output, total (sales) revenue. and total profits if the monopolist were to produce at the positions (a) through (d) indicated in table below? MR D AR 90 AC Costs and revenues O 9 18 27 45 54 63 Quantity per period Total Total Price($) Output Revenue ($) Profits ($) a. Total revenue maximization b. Profit-maximization c. Socially optimum price d. Fair-return price