TB MC Qu$.06-09$ Unbiased Expectations Theory Suppose that the current one$-$year $...$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 followsR$11=4\mathrm{.}50\%,$ E$($r$12)=5\mathrm{.}50\%,$ E$($r$13)=6\mathrm{.}00\%,$ E$($r$14)=6\mathrm{.}35\%$ Using the unbiased expectations theory, what is the current $($long$-$term$)$ rate for four$-$year$-$maturity Treasury securities$?$