a. Complete the following table and answer two questions about costs. Instructions: Enter your responses rounded to the nearest whole dollar. If you are entering any negative numbers be sure to include a negative sign () in front of those numbers. Rate of Output Total Cost Marginal Cost Average Cost 0 20 30 2. 45 $ 67 4 100 5 140 b. What output has the lowest per-unit cost equal to marginal units cost? c. What is the value of fixed costs