Suppose Fastest Company's current balance sheet showed book value weights of 33 percent debt, 11 percent preferred shares, and 56 percent common equity. Assuming its cost of debt was 2.6 percent, the cost of preferred shares was 4.6 percent, and the cost of common equity was 9 percent, estimate Fastest Company's WACC? (based on these book value weights). The WACC is nothing %. (Round to two decimal places.)