Digicomp's bonds will mature in 8 years. The bonds have a face value of $1,000 and a 8% coupon rate, paid semiannually. The price of the bonds is $1,110. The bonds are callable in 3 years at a call price of $1,050. What is their yield to call? 4.60% 5.53% 5.85% 6.40%