Additional Problem $03-06($Algo$)$

Monthly attendance at financial planning seminars for the past $24$ months, and forecasts and errors for those months, are shown in the

following table. Determine if the forecast is working by computing a tracking signal, beginning with month $10.$ updating MAD with

exponential smoothing. Use an alpha value of $0\mathrm{.}2$

Note: Round all your calculations to three decimal points.