Suppose that the top six firms in an industry have total annual sales of $150 billion, $100 billion, $90 billion, $60 billion, $50 billion, and $10 billion, respectively. Instructions: Round your final answers to the nearest whole number. a. What is the four-firm concentration ratio for this industry? percent b. What is the Herfindahl index for this industry? Suppose another industry has a Herfindahl index of 1,500. Are firms in the second industry likely to have more or less market power? C. Less