$(3$ pts$)$ Apply naive method.

$(3$ pts$)$ Apply weighted moving average method for $2$ periods with weights $4$ and $1,$ respectively for the last week and $2$ weeks ago.

C$.$

$($opts$)$ Compare thre nothod appted in paret$)(6)$and $(6$ sin mean absolute deviaton $($MAD$)$ Which

method is more accurate and what will be your purchase quantity for week $5?$