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: 1R1=0.47% E(2r1)=0.97%L2=0.06% E(3r1)=1.07%L3=0.11% E(4r1)=1.37%L4=0.13% Calculate the yield to maturity for four years. (Round your percentage answers to 2 decimal places. (e.g., 32.16))