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Reingaart Systems is expected to pay a $4.7 dividend at year end (D1 =$4.7). the dividend is expected to grow at a constant rate of 7.8% a year, and the common stock currently sells for $68 a share. The before-tax cost of debt is 7.1%, and the tax rate is 21%. The target capital structure consists of 61% debt and 39% common equity. What is the company's WACC if all equity is from retained earnings? 9.46% 9.16% 9.76% 10.06% 8.86%