given an optimal capital structure that is 50% debt and 50% common stock, calculate the weighted average cost for capital. coupon rate on bonds: 9 %. yield to maturity on bonds: 11% next expected dividend on common stock 3.00$, current price for common stock, 80$, growth rate of common stock dividend: 6%. tax rate: 25%. is it less that 7.5%, more than 7.5 and less than 9.5, more than 9.5 and less than 10.5, or more than 10.5?