Finance Question based on Bond Value as Maturity Approaches

An investor has two bonds in his portfolio. Each bond matures in 4 years, has a face value of $1,000, and has a yield to maturity equal to 8.6%. One bond, Bond C, pays an annual coupon of 10%; the other bond, Bond Z, is a zero coupon bond. Assuming that the yield to maturity of each bond remains at 8.6% over the next 4 years, what will be the price of each of the bonds at the following time periods? Assume time 0 is today. Fill in the following table. Round your answers to the nearest cent.

t	Price of Bond C	Price of Bond Z
0	$	$
1
2
3
4

I am stuck on this problem. Who ever helps, please provide the steps so I can understand how you got the answers. Im totally lost on this subject