Based on economists' forecasts and analysis, one-year Treasury bill rates and liquidity premiums for the next four years are expected to be as follows: R1E(2r1)=0.331=0.708L2=0.068 E(EF1)=0.808I3=0.151 R(4I1)=1.108L4=0.161 Calculate the yield to maturity for four years. (Round your percentage answers to 2 decimal places. (e.g., 32.16))