Output (units per day) Total fixed cost (dollars) Total cost (dollars) 4 Total variable cost (dollars) 0 25 50 75 100 125 20 20 20 20 20 20 9 13 16 18 20 45 70 95 120 125 a) From the above table, what is the total cost of producing 9 units? Show your steps. (3 points) b) From the above table, calculate the total variable cost of producing 16 units of output. Show your steps. (3 points) (3 points) c) Using the data in the above table, when output increases from 4 to 9 units, Calculate the marginal cost of one of those 5 units. Show your steps (4 points)