PLEASE HELP ASAP

The YTM is equal to 6.00%. We have the following bonds with a nominal value equal to 1 000 PLN: 1-year coupon bond with coupon rate equal to 4.0% and coupon payable four times a year, 5-year coupon bond with coupon rate equal to 7.0% and coupon payable once a year, to redeem bonds remains 16 months, 7-year zero-coupon bond. Calculate the bond prices, (17 points) Which bonds are worth buying if their prices are equal to 975 PLN, 1 050 PLN and 660 PLN, respectively? (3 points)