Oxy Corporation uses debt, preferred stock, and common stock to raise capital. The firm's capital structure targets the following proportions: debt, 48%, preferred stock, 13%, and common stock, 39%. If the cost of debt is 5.2%, preferred stock costs 8.9%, and common stock costs 10.8%, what is Oxy's weighted average cost of capital (WACC)? Oxy's weighted average cost of capital (WACC) is %. (Round to two decimal places.)