A static method of forecasting assumes that the estimates of level, trend, and seasonality within the systematic

Question:

A static method of forecasting

assumes that the estimates of level, trend, and seasonality within the systematic component do not vary as new demand is observed.
assumes that the estimates of level, trend, and seasonality within the systematic component vary as new demand is observed.
assumes that the estimates of level, trend, and seasonality are updated after each demand
observation.
All of the above are true.

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