1. find the HHI for two industries where 4 firms share the market. In industry A the 4 firms all have equal shares (i.e. 25% each). In industry B, 1 firm has a 70% share and the other 3 have 10% each.
A- Industry A is 0.0625 and Industry B is 0.52
B - There is not enough information to answer
C - Industry A is 0.25 and Industry B is 0.52