long$-$term debt, $10\%$ preferred stock, and $60\%$ common stock equity $($retained earnings, new common stock, or both$).$ The firm's tax rate is $22\%.$

Debt The firm can sell for $$1015$ a $15-$year, $$1,000-$par$-$value bond paying annual interest at a $9\mathrm{.}00\%$ coupon rate. A flotation cost of $2\mathrm{.}5\%$ of the par value is required.

Preferred stock $9\mathrm{.}00\%($annual dividend$)$ preferred stock having a par value of $$100$ can be sold for $$96.$ An additional fee of $$5$ per share must be paid to the underwriters.

wants to issue new new common stock, it will sell them $$1\mathrm{.}50$ below the current market price to attract investors, and the company will pay $$3\mathrm{.}50$ per share in flotation costs.

a$.$ Calculate the after$-$tax cost of debt.

b$.$ Calculate the cost of preferred stock.

c$.$ Calculate the cost of common stock $($both retained earnings and new common stock$).$

d$.$ Calculate the WACC for Dillon Labs.

Please do the calculation for a$,$b$,$c$,$d