Suppose that the current one-year rate (one-year spot rate) and expected one-year T-bill rates over the following 3 years (i.e., years 2, 3 and 4 respectively) are as follows:

1R1 = 0.4%, E(2r1) = 1.4%, E(3r1) = 8.8% E(4r1) = 9.15% Using the unbiased expectations theory, calculate the current (long-term) rates for three-year- and four-year-maturity Treasury securities.