Unbiased Expectations Theory Suppose that the current one-year rate (one-year spot rate) and expected one-year T-bill rates over the following three years (i.e., years 2, 3, and 4, respectively) are as follows: 1R1=6.05%, E(21) -6.55%, E(3r1) -7.55% E(41)=8.05% Using the unbiased expectations theory, what is the current (long-term) rate for four-year-maturity Treasury securities? 1.9540% O7.0500% 7.0470% 8.0500%