TB MC Qu$.15-24$ Given the following three periods...

Given the following three periods of data, what is the MAE?

Period Actual Demand Demand Forecast

$19392$

$29491$

$39193$

Multiple Choice

$1\mathrm{.}33$

$2\mathrm{.}00$

$3\mathrm{.}00$

$3\mathrm{.}25$