The following table shows the total output produced by the top six firms as well as the total industry output for four industries. (8 Points)

Firm	Industry A	Industry B	Industry C	Industry D
1	13,250	8,750	1,750	15,000
2	10,975	7,500	1,725	14,000
3	8,175	6,400	1,700	13,000
4	4,275	5,000	1,675	12,000
5	1,250	4,250	1,650	11,000
6	875	4,000	1,625	10,000
Total	45,350	70,900	30,125	120,000

a. What is the concentration ratio for Industry A? (1 point)

b. What is the concentration ratio for Industry B? (1 point)

c. What is the concentration ratio for Industry C? (1 point)

d. What is the concentration ratio for Industry D? (1 point)

e. Rank the four industries by their concentration ratio (from highest ratio to lowest) and using the quartile rule, that is,

output is < or =25%-Competitive,

output > 25% and < or =50% -Monopolistic Competitive Low ,

output is >50% and < or =75%-Monopolistic Competitive High,

output is >75% and < 100% -Oligopoly

categorize each as competitive, monopolistic competitive low, monopolistic competitive high, or oligopoly (4 points)