The following table provides hypothetical sales data for 10 firms that make up the wind turbine industry Ignoring the fact that these companies are from different countries, a, calculate the four-firm concentration ratio and b. the Herfindahl-Hirschman index (for the 10 firms) from this data. (Don't forget the H index is a %.) Show vour work Does this industry seem to be very concentrated at the international level? Explain. Sales millions of $ 36 Brand Nordex Ming Yang United Power 48 Gamesa GE Sulzon Group20 Siemens Enercon Goldwind Vestas 26 16 24 32 15 13