Williams, Inc., has compiled the following intormation on its financing costs: Type of Book Value Market Value Cost Financing Short-term debt $ 13,800,000 $ 13,400,000 3.6% Long-term debt 33,500,000 31,100,000 6.7 Common stock 10,800,000 81,000,000 12.5 3:10 Total $ 58,100,000 $125,500,000 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. OS 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.)