$($Individual or component costs of capital$)$ Compute the cost of capital for the firm for the following:

a$.$ A bond that has a $$1,000$ par value $($face value$)$ and a contract or coupon interest rate of $10\mathrm{.}9$ percent. Interest payments are $$54\mathrm{.}50$ and are paid

semiannually. The bonds have a current market value of $$1,130$ and will mature in $10$ years. The firm's marginal tax rate is $34$ percet.

b$.$ A new common stock issue that paid a $$1\mathrm{.}77$ dividend last year. The firm's dividends are expected to continue to grow at $7\mathrm{.}7$ percent per year, forever.

The price of the firm's common stock is now $$27\mathrm{.}94.$

c$.$ A preferred stock that sells for $$122,$ pays a dividend of $8\mathrm{.}6$ percent, and has a $$100$ par value.

d$.$ A bond selling to yield $11\mathrm{.}7$ percent where the firm's tax rate is $34$ percent.

a$.$ The after$-$tax cost of debt is

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