The following table shows predicted product demand using your particular forecasting method along with the actual demand that occurred:

FORECAST ACTUAL 1,500 1,400 1,700 1,750 1,800 1,550 1,500 1,600 1,650 1,700

a. Compute the tracking signal using the mean absolute deviation and running sum of forecast errors.

b. Discuss whether your forecasting method is giving good predictions.