3. A manager has been using a certain technique to forecast demand for project management software at her store. Actual demand and her corresponding predictions are shown below: Actual Demand Manager's Forecast Month Mare April May June July a. the tracking signal for these five months of forecasting? b. If the manager had used a 3-month moving average instead of her technique, what would have been her forecast for June and July? c. If the manager had used simple exponential smoothing with a -0.2 instead of her technique, what would the forecast for August be, assuming that simple exponential smoothing had produced a perfectly accurate forecast in March