Fit a model to ice cream production data using the following techniques and forecast the

$2020$ production in each case.

a$)$ Two$-$year moving average. $(3$ points$)$

b$)$ Four$-$year moving average. $(3$ points$)$

c$)$ Exponential smoothing with smoothing constant $=0\mathrm{.}2.(5$ point$)$

d$)$ Exponential smoothing with smoothing constant $=0\mathrm{.}4.(5$ point$)$

e$)$ Linear trend projection $($linear regression$).(10$ points$)$

f$)$ Plot a graph and determine which of the above techniques you would use to

forecast the ice cream production and why. $($Hint: The plot overall closest to actual

demand will be most accurate$).(4$ points$)$

g$)$ Alternatively, compute the MAD for e