i want good answers please

Estelle Inc. has a 15-year bond with a face value of $1,000 and an interest rate of 7%. The coupon is paid semiannually. Bonds of similar risk yield a 6% return. a. Compute the bond's value. b. Estimate the percentage change in the bond prices if the required return increases to 9 percent and drops to 4 percent. c. Discuss the relationship you demonstrated in regard to the interest rate risk d. You found out that the bond is selling on the market for $1,050. Compute the bond's yield to maturity and recommend if you should purchase this bond. e. Assume that the bond matures in 5 years instead of 15 years, recalculate your answers in parts a and b Explain the implications of your answers in parte, as they related to interest-rate risk