Can someone explain to me step by step how to do these problems please and thanks.

20.A zero-coupon bond is currently being traded at $223.86. The face value of the bond is $300 and the bond matures in exactly 6 years. a. How much is the yield-to-maturity of the bond? (Write your answer as a percentage and round your answer up to two digits after the decimal point (Example: 1.23%)) (2 points) b. If the bond's YTM does not change, what will be the bond price in exactly 3 years from now? (2 points)