can you figure what the abs dev $(3$ year$)$ and abs dev $($moving$)$ for all please ANSWER IN CHART FORMAT

$4$:$5-17$ Data collocted on the yearly demand for $50-$pound

bags of fertilizer at Wallace Garden Supply are

shown in the following table. Develop a $3-$year mov$-$

ing average to forecast sales. Then estimate dernand

again with a weighted moving average in which

sales in the most recent year are given a weight of $2$

and sales in the other $2$ years are each given a weight

of $1.$ Which method do you think is better?