9. Calculating the WACC In the previous problem, suppose the companys stock has a beta of 1.15. The risk-free rate is 3.7 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 35%. What is the companys WACC?

The previous problem (#8) is posted on this link:

https://www.chegg.com/homework-help/questions-and-answers/question-9-references-8-please-walk-9-child-trying-learn--8-book-value-versus-market-value-q15038293

I need #9 explained as if I were a child...I can't figure this out on my own.