3.2- ost art 3: More Practice- Use the graph below to answer the questions. ost MC 13. What is the marginal cost of the 9th unit? * [ / $12 14. How much is the total cost of producing 8 units? 10 ATC 15. What is the total variable cost of producing 8 units? AVC 16. How much is the fixed cost of producing 8 units? 17. How much is the total cost of producing 4 units? 18. How much is the fixed cost of producing 4 units? 19. Explain why your answers to question 16 and 18 a 2 4 6 8 10 12 the same? Quantity