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 srifoothing. Use an alpha value of $0\mathrm{.}2.($Round all your calculations to three decimal points.$)$

Answer is not complete.

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