A firm has $9.2 Billion debt outstanding, with a yield to maturity of 5% and a coupon rate of 5.8%. They have 198 million preferred shares outstanding, currently trading at $86.6. They also have 747 million common shares outstanding, currently trading at $49.04 and the corporate tax rate is 24%. If the return on common stock (return on equity) is 8.8% and the return on preferred stock is 6.8% what is the Weighted Average Cost of Capital (WACC)?