Consider a firm that has $13 milion in debt. Si millon in preferred stock, and $27 million in equity. The rate of return for debt, preferred stock, and equity is 3%, 6%, and 13%, respectively. The corporate tax rato is 35%. What is the weighted average cost of capital? Enter your answer as a percentage and rounded to 2 DECIMAL PLACES. Do not include the percentage sign in your answer. Enter your response below. Number 36