The following table shows predicted product demand using your particular forecasting method along with the actual demand that occurred:   FORECAST ACTUAL 1,515 1,585 1,415 1,515 1,715 1,615 1,755 1,680 1,805 1,730     Compute the tracking signal using the mean absolute deviation and running sum of forecast errors.

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Q: 89 july 223 Feb 57 august 286 mar 144 sept 212 april 221 oct 275 may 177 nov 188 june 280 dec 312 a)…

A: Month Demand Jan 89 Feb 57 mar 144 April 221 may 177 June 280 July 223 august 286…