last two are wrong, please help

Problem 18-4 WACC If Wild Widgets, Inc., were an all-equity company, it would have a beta of 95. The company has a target debt-equity ratio of .80. The expected return on the market portfolio is 12 percent and Treasury bills currently yield 3.7 percent. The company has one bond issue outstanding that matures in 21 years, a par value of $1,000, and a coupon rate of 6.6 percent. The bond currently sells for $1,080. The corporate tax rate is 24 percent a. What is the company's cost of debt? (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 cost of equity? (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? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Answer is complete but not entirely correct. a. Cost of debt Cost of equity WACO 5.98 14:38 % b. c. 10.00 %