Please try to give me a new answer which is never posted!

3. Price and cost per unit S MC PA T ATC P. R Demand MR 0 Quantity The diagram above represents a monopolistically competitive firm. Answer the questions below. (25 points) a. Is this firm operating in the short-run or long-run? How do you know? (5pt) b. Calculate this firm's accounting profit. (5pt) c. From the diagram, what is the productively efficient output for this firm? (5pt) d. From the diagram, economies of scale are maximized at which output level? Explain. (5pt) e. From the diagram, what is the allocationly efficient output for this firm? Explain. (5pt)