Help with wrong answers please

a. Assuming that the expectations hypothesis is valid, compute the expected price of the four-year zero coupon bond below at the start of (i) the first year; (ii) the second year; (iii) the third year; (iv) the fourth year. (Do not round intermediate calculations. Round your answers to 2 decimal places.) Answer is complete but not entirely correct. Beginning of Year Price of Bond Expected Price 1 $ 980.90 $ 771.76 2 $ 914.97 $ 823.40 3 $ 843.12 $ 833.43 X 4 $ 771.76 $ 910.51 b. What is the rate of return of the zero bond in years 1, 2, 3, and 4? Conclude that the expected return equals the forward rate for each year. (Do not round intermediate calculations. Round your answers to 2 decimal places.) Answer is complete but not entirely correct. Beginning of Year Expected Rate of Return 6.72 X % 1 2 7.21 % 3 8.52 % 4 9.25 > %