Ewha Corp has a target capital structure of $55\%$ common stock, $10\%$ preferred stock, and $35\%$ debt. Its cost of equity is $14\%,$ the cost of preferred stock is $6\%,$ and the cost of debt is $8\%.$ The relevant tax rate is $30\%.1.$ What is Ewha CorpsWACC? $2.$ What is Iwakop's after$-$tax cost of debt?