A typical firm in industry X has the following total cost function: TC = 400 + 20*q + 0.25*q2, where q represents the units of output. (a) What is the marginal cost at output level q=34? (Round to one decimal place.) (b) What is the average cost at output level q=34? (Round to one decimal place.) (c) At this level of output (q=34) the firm faces (economies or diseconomies) of scale?

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