typed solution and detail

Which of the following four statements on models for estimating volatility is incorrect? 1. In the EWMA model, some positive weight is assigned to the long-run average variance rate. 2. In the EWMA model, the weights assigned to observations decrease exponentially as the observations become older. 3. In the GARCH(1, 1) model, a positive weight is estimated for the long-run average variance rate. 4. In the GARCH(1, 1) model, the weights estimated for observations decrease exponentially as the observations become older