An AR(3) model has been fit to a time series. The estimates are ˆμ = 104, φˆ1 = 0.4, φˆ2 = 0.25, and φˆ3 = 0.1. The last four observations were Yn−3 = 105, Yn−2 = 102, Yn−1 = 103, and Yn = 99....

An AR(3) model has been fit to a time series. The estimates are ˆμ = 104, φˆ1 = 0.4, φˆ2 = 0.25, and φˆ3 = 0.1. The last four observations were Yn−3 = 105, Yn−2 = 102, Yn−1 = 103, and Yn = 99. Forecast Yn+1 and Yn+2 using these data and estimates.