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3. (12 points) Suppose a competitive firm (rm operating in purely competitive market} has fixed costs of $36!] and average variable cost (AVC} = 30 + 20. Assume that the market price is equal to $100 per unit. a) Prot mmdmizing level of output produced by this firm is equal to b) The maximum amount of prot received by this rm is equal to c) Producer surplus of the firm is equal to