For a company with 20% debt and 80% equity, that pays corporate tax at a rate of 30%, if the ytm is 2% what is the after-tax cost of interest? If the beta is 0,5, the risk-free rate is 3%, and the market risk premium is 8% what is the cost of equity. What is the company's WACC? If the company has a new project with a similar profile to other existing projects what discount rate should be used to discount the future cash flows from the project?