How many first initial values must the forecaster set using Holt's exponential smoothing? A. 0. B. 1. C. 2. D. 3. E. None of the above. 6. When calculating centered moving-average with order 4, how many data points are lost at the beginning of the original series? A. 1. B. 2. H C. 3. D. 4. E. None of the above. 7. A regression approach can also be used to deal with seasonality by using variables for the seasons. The missing word is: A. smoothing B. response C. residual D. dummy E. none of the above