how can i do these using my ti 84?

21. A corporate bond has a coupon rate of 9.25%, pays interest semi-annually, matures in 10 years, and has a yield-to-maturity of 8.75%. What is the present value of this bond? Assume the bond has a face value of $1,000? 22. Consider a bond with a 13.75 % coupon rate that pays semi-annual coupons, has a face value of $1,000, matures in 8 years, and has a current price of $1,265.40. What is the yield-to- maturity of this bond