The $3-$month weighted moving average for September using the following weights $W1=0\mathrm{.}12,W2=0\mathrm{.}33,$ and $W3=0\mathrm{.}55($for the most recent observation$)$ is:

$10\mathrm{.}35$

$10\mathrm{.}43$

$11\mathrm{.}22$

$12\mathrm{.}37$