Please show your calculations for the following: Suppose tha…

Please show your calculations for the following: Suppose that the most popular car dealer in your area sells 20 percent of all cars.  a)If all other car dealers sell either the same number (20%) or fewer,  what is the largest value that the  Herfindahl index could possibly take for car dealers in your area?  Show your calculation b) In that same situation,  what would  the four-firm concentration ratio be?  Show your calculations c) What would your result tell you about the market structure of car dealers in your area?