Problem 3-18 (Algo) A particular forecasting model was used to forecast a six-month period. Her April May June July August September FORECAST 254 329 404 354 378 454 ACTUAL 204 243 313 289 393 -7 a. Find the tracking signal for each month (Negative values should be indica decimal places.) Month Tracking Signal April May June July August September b. is the model being used is giving acceptable answers. No, the model's performance is poor, Yes, the model's performance is good. o search