Problem:

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 11.25%, and the tax rate is 40%. The firm will not be issuing any new stock.

Task:

Question: What is Quigley's WACC?

Note: Please provide equation and explain comprehensively and give step by step solution.