20 42 53 72 Quantity Use the above graph to answer the following questions: A. What is the average xed cost for the rm at 20 units of output (provide the actual numerical value)? Must show work in order to receive full credit. B. At what level of output will this rm begin to experience diminishing marginal product from its variable input in the short-run? Briey explain your reasoning. C. Provide a brief explanation for why average total costs are initially declining as the rm increases output in the short-run. Must include a brief discussion of both components of average total cost in your answer for full credit