An industry has the following market structere breakdown of the individual firm's perecnt share of revenue within the industry
25%, 22%, 16%, 13%, 10% 9%, 5%
A) What is the firm firm concentration ratio fo this industry?
B) What is the HHI fo this industry?
C What would be the change in the 4-frim ratio and HHI index if the three (3) largest firms merged?