Given the following data, what is MAD$/$MAE for the two$-$period moving average forecast $(M{A}_2)?$

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

$1\mathrm{.}0$

$\mathrm{.}6$

$1\mathrm{.}5$

$1\mathrm{.}05$