A firm has $9.5 Billion debt outstanding, with a yield to maturity of 5.3% and a coupon rate of 4.6%. They have 148 million preferred shares outstanding, currently trading at $92.29. They also have 827 million common shares outstanding, currently trading at $41.23 and the corporate tax rate is 25%. If the return on common stock (return on equity) is 9% and the return on preferred stock is 6.9% what is the Weighted Average Cost of Capital (WACC)?