The current T$-$bill rate is $4\mathrm{.}5\%$ and the inflationary premium is $3\%.$ What is the risk$-$free rate?

$1\mathrm{.}5\%$

$3\mathrm{.}0\%$

$4\mathrm{.}5\%$

$6\mathrm{.}0\%$

$7\mathrm{.}5\%$