HOW DO I SOLVE THESE QUESTION WITH AN HP 10BII+ FINANCIAL CALCULATOR?

1. What is the yield to maturity of a corporate bond with 13 years to maturity, a coupon rate of 8% per year, a $1,000 par value,and a current market price of $1,250? Assume semiannual coupon payments.

1. 5.3%
2. 4.2%
3. 4.7%
4. 6%

2. What is the yield to maturity of a bond that pays an 5% coupon rate with annual coupon payments, has a par value of $1,000, matures in 15 years, and is currently selling for $769?

1. 7.6%
2. 5.7%
3. 2.4%
4. 9.5%