"Foods'r Us$"$ a restaurant chain, has been using simple exponential smoothing to come up with their monthly forecasts. but still not sure of the "best" value of a to pick. They ran some computer runs with different values of a and the data yielded the following results:

$\backslash$table$[[a,$MAD$],[0\mathrm{.}15,11\mathrm{.}2],[0\mathrm{.}2,12\mathrm{.}1],[0\mathrm{.}25,10\mathrm{.}5],[0\mathrm{.}3,10\mathrm{.}1],[0\mathrm{.}35,11\mathrm{.}6],[0\mathrm{.}4,12\mathrm{.}7],[0\mathrm{.}45,10\mathrm{.}7],[0\mathrm{.}5,12\mathrm{.}5]]$

What is your suggested value of $a?$

$0\mathrm{.}25$

$0\mathrm{.}3$

$0\mathrm{.}2$

$0\mathrm{.}45$

$0\mathrm{.}15$