I 3. The table below presents information about price, output and costs of a single rm In the aluminum market Use the information below and ll in columns for TR, MR. MC, (5 points) P QD TC TR MR MC 400 o 140 o 0 0 350 1 220 350 300 2 320 600 25 3 440 750 200 4 580 800 150 5 740 750 100 6 940 600 a. Is the rm operating in the shortrun or longrun? Explain how do you know? b What output level should the rm produce to maximize profit? Explain why