Question 20 Suppose that the current one-year rate and expected one-year T-bill rates over the following three years he years 2, 3, and 4, respectively) are as follows: 1R1 1.8%, E(21) =3.18%, E(31) = 5.74%, E(41) - 7.79% Using the unbiased expectations theory, calculate the current (longterm) rates for four-year-maturity Treasury securities (Write your answer in percentage and round it to 2 decimal places)