Answer:
a. Calculation of the yield to maturity for a bond with a maturity years
Yield to Maturity = [(Face value/Bond price)^(1/Time period)] - 1
i. One year = (1000/920.90) - 1 = 0.0858942339 = 8.59%
ii. Two year = (1000/912.97)^(1/2) - 1 = 0.04657835011 = 4.66%
iii. Three year = (1000/826.62)^(1/3) - 1 = 0.06552758403 = 6.55%
iv. Four year = (1000/785.62)^(1/4) - 1 = 0.06217693669 = 6.22%
b. Calculation of the forward rate
Forward rate = [(1 + Next year YTM)^Period / (1+Previous year YTM)^Period} - 1
i. Second year = (1+4.66%)^2/(1+8.59%) - 1 = 0.00872231328 = 0.87%
ii. Third year = (1+6.55%)^2/(1+4.66%) - 1 = 0.08474130517 = 8.47%
iii. Fourth year = (1+6.22%)^2/(1+6.55%) - 1 = 0.05891022055 = 5.89%