Assume the current interest rate on a $1-$year Treasury bond

${(}_1{R}_1)$ is $6\mathrm{.}00$ percent, the current rate on a $2-$year Treasury

bond ${(}_1{R}_2)$ is $6\mathrm{.}75$ percent, and the current rate on a $3-$year

Treasury bond ${(}_1{R}_3)$ is $8\mathrm{.}00$ percent. If the unbiased

expectations theory of the term structure of interest rates is

correct, what is the $1-$year forward rate expected on Treasury

bills during year $3,{?}_3{f}_1?$