Suppose that the current three$-$year rate $($three$-$year spot rate$)$ and expected one$-$year T$-$bill rates over the following years are as follows:

$1$R$3=12\%,$ E$(2$r$1)=8\%,$ E$(3$r$1)=10\%$

What should be the current spot rate for one$-$year treasury bill?

Group of answer choices

$5\mathrm{.}59\%$

$18\mathrm{.}80\%$

$9\mathrm{.}00\%$

$9\mathrm{.}99\%$

$18\mathrm{.}26\%$