Compute the mean absolute deviation based on below information

Actual Forecast

$1011$

$810$

$108$

$66$

$98$

Question $6$ options:

$1\mathrm{.}2$

$2\mathrm{.}0$

$-0\mathrm{.}2$

$-1\mathrm{.}0$

$0\mathrm{.}0$