The tracking signals computed using past demand history for three different products are as follows. Each product used the same forecasting technique. a. Graph the tracking signals for each products. Instructions: 1. Use the line tool (TS1, TS2, TS3) to draw the tracking signals for each products. 2. To earn full credit for this graph you must plot all required points, beginning with the first unit. 3. To enter exact coordinates, double click on the point and enter the values of x and y