To calculate the number of years until maturity, assume that it is currently January $15,2022.$ All of the bonds have a $$2,000$ par value and pay semiannual coupons.

Company $($Ticker$)$ Coupon Maturity Last Price Last Yield Estimated $ Volume $(000$s$)$

Xenon, Incorporated $($XIC$)5\mathrm{.}400$ January $15,203492\mathrm{.}685??$question mark $57,362$

Kenny Corporation $($KCC$)4\mathrm{.}125$ January $15,2029??$question mark $3\mathrm{.}8448,941$

Williams Company $($WICO$)??$question mark January $15,2031104\mathrm{.}3104\mathrm{.}1243,802$

What is the coupon rate for the Williams Company bond?

Note: Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$