Given is a historical time series for job services demand in the prior $6$ months.

$\backslash$table$[[$Month$,$Demand$],[1,11],[2,14],[3,15],[4,14],[5,15],[6,19]]$

a$)$ The MAD based on the Exponential smoothing $=0\mathrm{.}2$ method $=$ Blank $1(4$ decimal places$)$ b$)$ The MAD based on the $3$ months moving average method $=$ Blank $2($in $4$ decimal places$)$ c$)$ The MSE based on the $3$ months moving average method $=$ Blank $3_d)$ Use MAD as an criterion to evaluate forecasting methods I $($exponential smoothing, $=0\mathrm{.}2)$ and II $(3$ month moving average$).$ The most accurate forecasting methods between I and II is method Blank $4($enter I or II$)$