Need help with calculating cost of common equity.

Patton Paints Corporation has a target capital structure of 35% debt and 65% common equity, with no preferred stock. Its before-tax cost of debt is 11% and its marginal tax rate is 40%. The current stock price is P_0 = $29.50. The last dividend was D_0 = $2.25, and it is expected to grow at a 5% constant rate. What is its cost of common equity and its WACC? Round your answers to two decimal places. a. r_s = % b. WACC = %