4. A monopolist faces demand p = 10 Q and has costs TC 2 10 + Zq. a. Provide expressions for marginal revenue and marginal cost. b. Maximize the firm's profit to determine the equilibrium price, quantity, and profit. c. The monopolist faces the prospect of entry by competitor with the same cost function. If the firm enters, they will compete by choosing quantities. Does the monopolist need to worry about this entry threat? Explain. d. The government is considering a subsidy of4 for all firms in this industry. Should the monopolist support or oppose this policy? Explain