You were hired as a consultant to Quigley Company, whose target capital structure is 35% debt, 10% preferred, and 55% common equity. The interest rate on new debt is 6.50%, the yield on the preferred is 6.00%, the cost of retained earnings is 10-50%, and the tax rate is 25. The firm will not be issuing any new stock. What is Quigley's WACC Round final answer to two decimal places. Do not round your intermediate calculations. O 09.37% O b. 6.73% O c. 8.0895 O d. 6.97% O c. 6.11%