I have got the wrong answer several times on here. please help me figure this out!

Yoi are given the following information for Lightning Power Co. Assume the company's tax rate is 24 percent. Debt: 19,0006.8 percent coupon bonds outstanding, $1,000 par value, 24 years to maturity, selling for 111 percent of par; the bonds make semiannual payments. Common stock: 520,000 shares outstanding, selling for $70 per share; beta is 1.21 . Preferred stock: 23,000 shares of 4.6 percent preferred stock outstanding, currently selling for $91 per share. The par value is $100 per share. Market: 6 percent market risk premium and 5.5 percent risk-free rate. What is the company's WACC? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Answer is complete but not entirely correct