Firms unlevered required return on equity?

A company has expected free cash flows in perpetuity of $10 million, a cost of equity capital of 10%, a cost of debt capital of 5%, and debt-to-equity ratio of 0.4. In perfect capital markets (no taxes), what is the firm's unlevered required return on equity? (rounded to the nearest 10th of a percent in percent terms - so for example 0.0876 would be " 8.8 )