the interest on a one year US Treasury security was $6\mathrm{.}38\%,$ the interest on a two year US Treasury Security was $6\mathrm{.}97\%,$ and the interest on a three year US Treasury Security was $7\mathrm{.}39\%.$ The interest on a one year US Treasury security in two years would be:

$7\mathrm{.}56\%$

$6\mathrm{.}91\%$

$8\mathrm{.}23\%$

$6\mathrm{.}68\%$