A company has actual unit demand for three consecutive years of $124,126,$ and $135.$ The respective forecasts for the same three years are $120,120,$ and $130.$ What is the MAD value that can be computed from this data?

Given the weekly demand information and weights, what is the weighted moving average forecast of the $5$ th period or week? The weights for period $t-1,t-2,$ and $t-3$ are $0\mathrm{.}7,0\mathrm{.}2,$ and $0\mathrm{.}1$ individually $($putting more weight to the most recent past demand$).$

$\backslash$table$[[$Week$,$Demand,Forecasting$],[1,100,],[2,140,],[3,190,],[4,150,],[5,,]]$