Case $2.$

The Chiquita Banana Company bases its annual sales predictions on official results of total demand in the industry. The total demand data and sales made by the company in the last $10$ years are given below.

$\backslash$table$[[$Demand total,$\backslash$table$[[$Sales$],[($millions$)]]],[100,000,40],[40,000,25],[70,000,35],[213,000,70],[150,000,90],[50,000,50],[120,000,80],[90,000,55],[67000,45],[55,000,70],[75,000,35]]$

i$)$ A $4-$year moving average.

ii$)$ A $9-$year weighted moving average using $0\mathrm{.}3,0\mathrm{.}4,$ and $0\mathrm{.}6,$ with the highest weights to the most recent months.

iii$)$ Exponential smoothing with $=0\mathrm{.}5$ and a forecast for year $5.$

c$)$ With the data provided, what method would allow you to prepare the sales forecast for the next $5$ years?