What is the bond's yield to maturity?

A 8% coupon bond has a par value of $1,000 and a yield-to-maturity of 8%. You purchase the bond when it has exactly 12 years remaining until maturity. You hold the bond for 6 months, collect the coupon payment, and then sell the bond immediately. If the bond's yield-to-maturity is 4% when you sell it, what is your percentage return over this 6-month holding period? Enter your answer as a decimal and show 4 decimal places. For example, if your answer is 6.25%, enter .0625.

You own a bond with a coupon rate of 6.3 percent and a yield to call of 7.2 percent. The bond currently sells for $1,105. If the bond is callable in five years, what is the call premium of the bond? (Do not round intermediate calculations. Round your answer to 2 decimal places.)

Suppose a​ five-year, $1,000 bond with annual coupons has a price of $896.24 and a yield to maturity of 6.4%.What is the​ bond's coupon​ rate? (round to 3 decimal places)