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# (10 pts) Consider a stationary series zt which is characterized by model 1: Model 1: zt = + at 1at1, at N(0, 2), |1|lt;1 Find the autoregressive...

a. (10 pts) Consider a stationary series zt which is characterized by model 1:

Model 1: zt = δ + at − θ1at−1, at ∼ N(0, σ2), |θ1|<1

Find the autoregressive (AR) representation of zt.