Please help me solve and provide work to help me understand what I was doing wrong. Please SHOW work for a calculator. Thank you

Calculating the WACC In the previous problem, suppose the company's stock has a beta of 1.10 . The risk-free rate is 2.9 percent and the market risk premium is 7 percent. Assume that the overall cost of debt is the weighted average implied by the two outstanding debt issues. Both bonds make semiannual payments. The tax rate is 23 percent. What is the company's WACC? 8. Book Value versus Market Value Hero Manufacturing has 7.6 million shares of common stock outstanding. The current share price is $67 and the book value per share is $4. The company also has two bond issues outstanding, both with semiannual coupons. The first bond issue has a face value of $80 million and a coupon rate of 6.8 percent and sells for 109.5 percent of par. The second issue has a face value of $65 million and a coupon rate of 7.1 percent and sells for 112.4 percent of par. The first issue matures in 9 years, the second in 25 years. a. What are the company's capital structure weights on a book value basis? b. What are the company's capital structure weights on a market value basis? c. Which are more relevant, the book or market value weights? Why? 9. Calculating the WACC In the previous problem, suppose the company's stock has a beta of 1.10. The risk-free rate is 2.9 percent and the market risk premium is 7 percent. Assume that the overall cost of debt is the weighted average implied by the two outstanding debt issues. Both bonds make semiannual payments. The tax rate is 23 percent. What is the company's WACC? Calculating the WACC In the previous problem, suppose the company's stock has a beta of 1.10 . The risk-free rate is 2.9 percent and the market risk premium is 7 percent. Assume that the overall cost of debt is the weighted average implied by the two outstanding debt issues. Both bonds make semiannual payments. The tax rate is 23 percent. What is the company's WACC? 8. Book Value versus Market Value Hero Manufacturing has 7.6 million shares of common stock outstanding. The current share price is $67 and the book value per share is $4. The company also has two bond issues outstanding, both with semiannual coupons. The first bond issue has a face value of $80 million and a coupon rate of 6.8 percent and sells for 109.5 percent of par. The second issue has a face value of $65 million and a coupon rate of 7.1 percent and sells for 112.4 percent of par. The first issue matures in 9 years, the second in 25 years. a. What are the company's capital structure weights on a book value basis? b. What are the company's capital structure weights on a market value basis? c. Which are more relevant, the book or market value weights? Why? 9. Calculating the WACC In the previous problem, suppose the company's stock has a beta of 1.10. The risk-free rate is 2.9 percent and the market risk premium is 7 percent. Assume that the overall cost of debt is the weighted average implied by the two outstanding debt issues. Both bonds make semiannual payments. The tax rate is 23 percent. What is the company's WACC