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 (000s) Xenon, Incorporated (XIC) 5.400 January 15, 2034 92.685 ??question mark 57,362 Kenny Corporation (KCC) 4.125 January 15, 2029 ??question mark 3.84 48,941 Williams Company (WICO) ??question mark January 15, 2031 104.310 4.12 43,802 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., 32.16