You find the following corporate bond quotes. To calculate the number of years until maturity, assume that it is currently January 15, 2019. The bonds have a par value of $2,000 and semiannual coupons. Last Last Company (Ticker) EST $ Vol (000's) Coupon Price Yield Maturity Jan 15, 2038 Xenon, Inc. (XIC) 6.900 94.333 ?? 57,377 Kenny Corp. (KCC) 7.270 ?? 6.32 48,956 Jan 15, 2035 Jan 15, 2041 Williams Co. (WICO) ?? 96.885 6.57 43,817 What is the coupon rate for the Williams Co. bond? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Coupon rate %