Williams, Inc., has compiled the following information on its financing costs: Type of Book Value Market Value Cost Financing Short- term $ 13,800,000 $ 13,400,000 3.6 % debt Long- term 33,500,000 31,100,000 6.7 debt Common 10,800,000 81,000,000 12.5 stock Total $ 58,100,000 $ 125,500,000 This is all the information given: The company is in the 24 percent tax bracket and has a target debt-equity ratio of 60 percent. The target short-term debt/long-term debt ratio is 15 percent. a. What is the company's weighted average cost of capital using book value weights? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. What is the company's weighted average cost of capital using market value weights? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) c. What is the company's weighted average cost of capital using target capital structure weights? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)