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SolutionSolution1. Find marginal revenue for the firms that face the following demand curves:a. Q= 1,000 –5b. Q= 100P–P2PQQ20.4Q2–10.5:Q2. Suppose a firm faces demand of Q= 300 –2Pand has a total cost curve of TC= 75Q+ Qa. What is the firm’s marginal revenue?b. What is the firm’s marginal cost?c. Find the firm’s profit-maximizing quantity where MR= MCd. Find the firm’s profit-maximizing price and profit.2..PQ2:QThe Calculus of Profit Maximization9