help me solve this!

The effect of tax rate on WACC K. Bell Jewelers wishes to explore the effect on its cost of capital of the rate at which the company pays taxes The firm wishes to maintain a capital structure of 30% debt, 10% prederred stock, and 60% common stock. The cost of financing with retained earnings is 18%, the cost of preferred siock financing is 11%, and the before-tax cost of debt financing is 8%. Calculate the woighted average cost of capital (WACC) given a tax rate of 35% The firmis WaCCis (Round to two decimal places)