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3. Suppose there are 100 identical manufacturers in a perfectly competitive industry, and the cost function of each manufacturer is STC = 0.102 +Q + 10 . The cost is calculated in US dollars. (25 points) Calculate the market supply function. b. Suppose that the market demand function is Q = 4000 400P, calculate the equilibrium price and output. Suppose the manufacturer is charged a tax of $0.9 per unit of product, what about the new equilibrium price and output. a. C