A firm's outstanding bonds have a par value of $$1,000,$ a coupon rate of $6\%,$ semi$-$annual coupon payments, and $12$ years remaining until maturity. If the bond's market price is $$980$ and the tax rate is $18\%,$ what is its after$-$tax cost of debt? Enter your answer as an annualized rate in decimal format, and show four decimal places. For example, if your answer is $5\mathrm{.}1\%,$ enter $\mathrm{.}0510.$

SHOW how to do this in excel