PLEASE HELP ASAP!

Oxy Corporation uses debt, preferred stock, and common stock to raise capital. The firm's capital structure targets the following proportions: debt, 51%; preferred stock, 10%; and common stock, 39%. If the cost of debt is 5.9%, preferred stock costs 7.8%, and common stock costs 9.9%, what is Oxy's weighted average cost of capital (WACC)? Oxy's weighted average cost of capital (WACC) is %. (Round to two decimal places.)