Fawaz Abdulaziz Alhokair Company reported the following balance sheet:

The stock is currently selling for SAR $20$ per share and there are $100$ shares outstanding

Its bonds are $12-$year bonds with $9\%$ coupon rate paid annually and the face value of SAR $500.$ They are currenty selling at SAR $620$

The required rate of return on its common stock is $18\%.$

Assume the firm's tax rate is $40\%.$

a$.$ The before tax cost of debt $(rd)$ is $,|\%($use $2$ decimals$)$

b$.$ The weights of debt using book value f$($dse $2$ decimals$)$

c$.$ The cost of equity is forse $2$ decimals$)$

d$.$ The WACC using the Book value weights is fldse $2$ decimals$)$