Ninecent Corporation has a target capital structure of 70 percent comimon stock, 5 percent preferred stock, and 25 percent debt its cost of equity is 10 percent, the cost of preferred stock is 6 percent, and the pretax cost of debt is 7 percent. The relevant tax rate is 22 percent Q. What is the company's WACC? Note: Do not round intermediete colculetions and enter your onswer os o percent rounded to 2 decimal places, eg., 3216 . b. What is the aftertax cost of debt? Note: Do not round intermediote calculotions and enter your answer es o percent rounded to 2 decimal places, e.g., 3216