Table 13-19 Refer to Table 1 3-19. What is the shape of the average-totalcost curve

Table 13-19 Marginal Labor Output 100 50 350 30 Product 100 50 ariable Cost $0 $5 $10 $15 $20 $25 $30 Fixed Cost $5 $5 $5 $5 $5 $5 $5 Refer to Table 13-19. What is the shape of the average-total-cost curve?