Reingaart Systems is expected to pay a $4.2 dividend at year end (D1 =$4.2), the dividend is expected to grow at a constant rate of 4.1% a year, and the common stock currently sells for $62 a share. The before-tax cost of debt is 8.4%, and the tax rate is 24%. The target capital structure consists of 75% debt and 25% common equity. What is the company's WACC if all equity is from retained earnings? 8.41% 7.51% 8.11% 7.81% 8.71%