Does a firm have a capital structure of $20\%$ debt, $70\%$ equity, and $10\%$ preferred stock?

Now, let's look at the specifics. The preferred stock, which is priced at $$80,$ pays a $$6$ dividend. The common stock, which is sold for $$50,$ pays a $$5$ dividend that is expected to grow by $2\%$ annually. The bonds, currently selling for $$818,$ have a maturity date of $15$ years and pay a coupon rate of $5\%.$ The firm operates under a tax rate of $40\%.$

$1.$ What is the cost of the preferred stock? $\_\_\_\_\_\_\_\_$

$2.$ What is the cost of the common stock? $\_\_\_\_\_\_\_\_$

$3.$ What is the cost of the bonds? $\_\_\_\_\_\_\_\_$

$4.$ What is the firm$$s WACC? $\_\_\_\_\_\_\_\_\_\_$