Suppose each of the 50 states in the United States had only one gasoline station, and all stations were the same size (sales were the same in each gas station).

(a) calculate the four-firm concentration ratio for the state of New York

(b) calculate the four-firm concentration ratio for the entire country

(c) calculate the Herfindahl-Hirschman index for the state of New York.

(d) calculate the Herfindahl-Hirschman index for the entire country.