Calculate the after$-$tax weighted$-$average cost of capital $($WACC$)$ for Capstone's Incorporated based on the following information:

Debt: $$150$ million book value outstanding. The debt is trading at $0\%$ of book value. The yield to maturity is $10\%.$

Equity: $$50$ million book value. $3$ million shares outstanding traded at $$80$ per share on NYSE. Assume the expected rate of return on Capstone's stock is $20\%.$

Marginal tax rate is $Tc=35\%.$

Suppose Capstone is evaluating a project that has the same business risk as the company but a higher target debt ratio of