Six years ago, Shirley Harper bought a $10-$year bond that pays $7$ percent semiannually for $$965\mathrm{.}35.$ Today, she sold it for $$1,250.$ What is the realized yield on her investment? $($Round to the closest answer$)$

$9\mathrm{.}12\%$

$10\mathrm{.}86\%$

$4\mathrm{.}56\%$

$5\mathrm{.}43\%$