suppose the four largest producers of computer monitors in the countrty of figiland have market shares of 35%, 30%, 15%, and 10% respectivly a. what is the four-firm concentration ratio in Digiland? b. what is the structure of the computer monitor market in digiland c. what means of raising hte price might be tempting for monitor producers in digiland that would not be feasable in a perfectly competative market