Assume that the market shares for antidepressants are as follows: Brand Market Shares Prozac 40% Paxil 25% Zoloft 25% others 10% (a) Calculate the Herfindahl-Hirschman Index (HHI) for the antidepressant market based upon these market share numbers. (b) Calculate the Herfindahl-Hirschman Index (HHI) for the antidepressant market under the assumption that the makers of Prozac and Zoloft merge. (c) Is the proposed merger of the makers of Prozac and Zoloft dangerously anti-competitive?