A bond has a $1,000 par value, 18 years to maturity, and pays a coupon of 5.5% per year, semiannually. The bond is callable in eight years at 115% of its par value. If the bond's price is $1,042.28, what is its yield to call? 1) 6.30% 2) 6.44% 3) 6.21% 4) 6.41% O 5) 6.35%