Consider using a simple exponential smoothing model. In your analysis, test two alpha values, $0\mathrm{.}2$ and $0\mathrm{.}4.$ 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.

Note: Round your answers to $2$ decimal places.