Suppose that the 5 firms in Industry A have annual sales of 25, 25, 20, 20, and 10 percent of total industry sales. For the five firms in Industry B the figures are 50, 15, 15, 10, and 10 percent. Calculate both a 4-firm concentration ratio and the Herfindahl index for each industry. What do you conclude about the competetiveness of each Industry? Explain