Given the following data, what is MAD$/$MAE for the exponential smoothing forecast with $a=\mathrm{.}2?$

Use a na$$ve forecast as your starting point.

$\backslash$table$[[$Month$,$Dema$],[1,19],[2,20],[3,18],[4,19],[5,17]]$

$\mathrm{.}842$

$1\mathrm{.}0$

$1\mathrm{.}5$

$1\mathrm{.}05$