What is the bid$-$ask spread if the current ask prices for DEF are $$9\mathrm{.}05$ and $$9\mathrm{.}26$ and current bid prices are $$8\mathrm{.}73$ and $$8\mathrm{.}82?$

$$ $$0\mathrm{.}32$

$$0\mathrm{.}44$

$$0\mathrm{.}53$

$$0\mathrm{.}23$