U-Shaped Long Run Average Cost Curve for Alternative Plant Sizes Showing Economies of Large-Scale Production Average Cost S SRAC, SRAC SRAC. SRACKSRAC. LRAC T Quantity of output per period of time SRAC - Short run average cost curves for alternative size plants. LRAC - Long run average cost curve. b. Clearly label on the above graph with a "C" the per unit cost of producing Q3 output with plant size "4" for this firm. You must be very exact. Explain