having problems understanding how to do questions likes these. Could you show your work also! thanks!

Sapp Trucking's balance sheet shows a total of noncallable $45 million long-term debt with a coupon rate of 7.00% ard a yield to maturity of 4.18%. This debt currently has a market value of $50 million. The balance sheet also shows that the company has 10 million shares of common stock, and the book value of the common equity (common stock plus retained earnings) is $55 million. The current stock price is $20 per share; stockholders' required return, rs, is 16.71%; and the firm's tax rate is 40%. The CFO thinks the WACC should be based on market value weights, but the idiot president thinks book weights are more appropriate. What is the difference between these two WACCs? Your Answer: Answer Daves Inc. recently hired you as a consultant to estimate the company's WACC. You have obtained the following information. (1) The firm's noncallable bonds have a yield to maturity of 7.5% (2) The company's tax rate is 40%. (3) The risk-free rate is 2.5%, the market risk premium is 7.0%, and the stock's beta is 0.8. (4) The target capital structure consists of 35% debt and the rest is common equity. The firm uses the CAPM to estimate the cost of equity, and it does not expect to issue any new common stock. What is its WACC