Next, consider using a simple exponential smoothing model. In your analysis, test two alpha

values, $0\mathrm{.}2$ and $0\mathrm{.}4.$ Use the same criteria for evaluating the model as in part $1.$ When using an

alpha value of $0\mathrm{.}2,$ assume that the forecast for week $1$ is the past three$-$week average $($the average

demand for periods $-3,-2,$ and $-1).$ For the model using an alpha of $0\mathrm{.}4,$ assume that the forecast

for week $1$ is the past five$-$week average.