A company's bonds will mature in 20 years and have a face value of $1,000, a 6.25% coupon rate paid semiannually. The price of the bonds is $1,100. The bonds are callable in 5 years at a call price of $1,090. What is their yield to maturity? What is their yield to call? What is the after-tax cost of debt on these bonds if they are not called and the tax rate is 25%?