According to Ryze Tech's balance statement, its total debt is $30 million, its preferred stock is worth $5 million, and its total equity is $25 million. The tax rate is 22%, while cost of debt is 5%, cost of prefereed stock is 2%, and cost of common equity is 9%. What is Ryze's WACC (in percent) if its intended capital structure is 75% common stock, 20% debt, and 5% preferred stock?