4. The firm's tax rate is 25%, and the market value of debt is $600 million. Given this and the information in parts 1-3, calculate the firm's weighted average cost of capital. (6 points) 1. Solaris Corp.'s common stock has a beta of 1.6. The risk- Calculate the firm's cost of common stock, kes: (4 points) 2. Solaris' stock price is $25 per share, and there are 30 million shares outstanding. Calculate the firm's market value of common stock. (2 points) 3. Solaris' bonds have a coupon rate of 10%, paid semi- annually. The bonds mature in 15 years, have a face value of $1,000, and a price of $910. Calculate the firm's cost of debt, ko