$($Individual or component costs of capital$)$ Compute the costs for the following sources of financing:

a$.$ A $$1,000$ par value bond with a market price of $$940$ and a coupon interest rate of $9$ percent. Flotation costs for a new issue would be approximately $7$ percent. The bonds mature in $11$ years and the corporate tax rate is $21$ percent.

b$.$ A preferred stock selling for $$106$ with an annual dividend payment of $$9.$ The flotation cost will be $$9$ per share. The company's marginal tax rate is $21$ percent.

c$.$ Retained earnings totaling $$4\mathrm{.}8$ million. The price of the common stock is $$65$ per share, and dividend per share was $$9\mathrm{.}82$ last year. The dividend is not expected to change in the future.

d$.$ New common stock for which the most recent dividend was $$2\mathrm{.}69.$ The company's dividends per share should continue to increase at a growth rate of $8$ percent into the indefinite future. The market price of the stock is currently $$46$; however, flotation costs of $$8$ per share are expected if the new stock is issued.

a$.$ What is the firm's after$-$tax cost of debt on the bond?

$\%($Round to two decimal places.$)$