You find the following corporate bond quotes. To calculate the number of years until maturity, assume that it is currently January $15,2022.$ The bonds have a par value of $$2,000$ and semiannual coupons. Company $($Ticker$)$ Xenon, Incorporated $($XIC$),$ Kenny Corporation $($KCC$),$ Williams Company $($WICO$).$ Coupon:$6\mathrm{.}400,7\mathrm{.}220,??.$ Maturity: January $15,2044,$ January $15,2038,$ January $15,2040.$ Last Price: $94\mathrm{.}303,??,94\mathrm{.}835.$ Last Yield: $??,6\mathrm{.}22,7\mathrm{.}04.$ Estimated $ Volume $(000$s$)$: $57,372,48,951,43,812.$ What is the coupon rate for the Williams Company bond?