Question $3[8$ marks$]$

$3A$

Forecast week $4$ and $5$ using $3$ weeks moving averages with weights $0,5,0\mathrm{.}3,0\mathrm{.}2$

Full workings must be shown!

$3$b

Forecast week $3$ & $4$ using the $3$ week "Exponential Moving Average" with alpha $95\%$

Full workings must be shown