2 points Suppose that the current one-year rate and expected one-year T-bill rates over the following three years i... years 2, 3 und 4, respectively) are i follows: 1R1 = 1.89%, E(211) 3.54%, E(3rl) -6.74%, E(41) - 7.3% Using the unbiased expectations theory, calculate the current (long-term) rates for four-year-maturity Treasury securities (Write your answer in percentage and round it to 2 decimal places)