Riemann's currently has a weighted average cost of capital of 10 percent based on a combination of debt and equity financing. The firm has no preferred stock. The current debt-equity ratio is 0.64 and the aftertax cost of debt is 5.5 percent. The company just hired a new president who is considering eliminating all debt financing. All else constant, what will the firm's cost of capital (in percents) be if the firm switches to an all-equity firm?