Consider the following bonds

BOND A: 0.0% annual coupon rating - 15 year maturity

BOND B: 0.0% annual coupon rating - 10 year maturity

BOND C: 4.1% annual coupon rating - 15 year maturity

BOND D: 8.1% annual coupon rating - 10 year maturity

What is the percentage change in the price of each bond, BOND A, BOND B, BOND C, and BOND D if its yield to maturity falls from 6.7% to 5.7%?

Bond A percentage change _____

Bond B percentage change _____

Bond C percentage change _____

Bond D percentage change _____

(last time I posted this question the answerer thought it was multiple choice, please note its a four part question, thankyou :) )