Given the following adjustable$-$rate mortgage information: $1-$Year Teaser Rate: $5\mathrm{.}505$ Margin $3\mathrm{.}00\%$ Annual Cap: $1\mathrm{.}5\%($applies to teaser$)$ Lifetime Cap: $4\mathrm{.}00\%($applies to teaser$)$ Indec Y $.1$:$4\mathrm{.}25\%,$ Yr $24\mathrm{.}75\%,$ Yr $3$:$5\mathrm{.}50\%,$ yr $4$:$6\mathrm{.}0\%$ What will the interest rate be in year lour?

$5\mathrm{.}50\%$

$9\mathrm{.}00\%$

$6\mathrm{.}00\%$

$9\mathrm{.}50\%$