Does someone know how to do this problem?

Will rate a thumb up for good response thanks so much!

1. ABC Co. issued ten-year $1,000 par value 5% coupon bonds on April 1, 2015. The bonds' coupons are paid semi-annually on April 1 and October 1. The bonds are listed and traded on the New York Stock Exchange (NYSE). You bought the bond on the secondary market on July 1, 2020. The yield to maturity at that date was 3%. a. What was the clean price of the bond on July 1, 2020? b. What was the full invoice price of the bond on July 1, 2020