River bought a $17\mathrm{.}5\%$ bond price at $111\%$ of par that had $11$ years until it matures. $1$ year later the yield to maturity on this bond is $7\mathrm{.}8\%.$What return did she earn on this bond?

Question $14$ options:

$3\mathrm{.}86\%$

$4\mathrm{.}86\%$

$0\mathrm{.}86\%$

$5\mathrm{.}86\%$

$9\mathrm{.}86\%$