Your firm's capital structure is as follows: Debt: Book value = $200m Market value = $225m Coupon rate = 8% Yield to Maturity = 6% Preferred Stock Book value $75m Market value = $75m Required Rate of Return = 9% Common Stock Book value $150m Market value $300m Required Rate of Return -12% Assume that the corporate tax rate is 35%. What is your firm's WACC? a. 8.27% Ob. 9.38% c. 7.66% Od. 9.08% e. 8.59%