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b.What is the value of the firm's fixed costs?c.What is the equation for the firm'sATCcurve?d.Add theATCcurve to your graph in part a.�a.The profit-maximizing price and quantity is found by settingMR =MC:��100?2Q= 20��Q= 40��P= 100?40 = $60b. Because this firm is in long-run equilibrium, economic profit iszero.��Profit =TR ? TC= 0.��PQ?(fixed costs + variable costs) = 0��$60�40?[fixed costs + ($20�40)] = 0��$2,400?$800 = fixed costs��fixed costs = $1,600c.ATC = TC/Q= (1,600 + 20Q)/Q= 1,600/Q+ 20d.