$($a$)$ Plot the data. Just by looking at the plot, do you think a $3-$week simple moving average would be a better forecast, or a $6-$week simple moving average? Just by looking at the plot, do you think an exponential smoothing with value of $\backslash$alpha $=0\mathrm{.}2$ would be better forecast or would $\backslash$alpha $=0\mathrm{.}6$ be better? Explain your reasoning.