can someone please help out with the wrong answers

Problem 10-20 (Algo) Required: Fill in the table below for the following zero-coupon bonds, all of which have par values of $1,000. Use semi-annual periods. (Do not round intermediate calculations. Round your answers to 2 decimal places.) Answer is complete but not entirely correct. Maturity Yield to Price (years) Maturity 20 3.50 % 20 2.57 % 10 5.17 % 14 14.00 % 13 10.00 % 8.00 % 555555 500 600 600 150.40x 281.24 500 8.84 33