Marginal Variable Fixed Cost Labor Output Product Cost SO 100 100 250 $10 350 $15 50 $20 25 $25 430 $30 I. Refer to Table 13-19. What is the marginal product of the second worker? 2. Refer to Table 13-19. What is the total output of five workers? 3. Refer to Table 13-19. What is the marginal product of the sixth worker? 4. Refer to Table 13-19. What is the shape of the marginal-cost curve? 5. Refer to Table 13-19. What is the shape of this firm's totalcost curve? 6. Refer to Table 13-19. What is the average total cost of producing 425 units of output? 7. Refer to Table 13-19. What is the average variable cost of producing 400 units of output? 8. Refer to Table 13-19. What is the average fixed cost of producing 430 units of output? 9. Refer to Table 13-19. What is the shape of the average-fixed-cost curve