Question: QI (5 points): Find the autocorrelation function (ACF) of the following ARMA models 1. 2. 3. 4. 5. AR(I) model: zt = 0.7zt_1 +

QI (5 points): Find the autocorrelation function (ACF) of the following ARMA

QI (5 points): Find the autocorrelation function (ACF) of the following ARMA models 1. 2. 3. 4. 5. AR(I) model: zt = 0.7zt_1 + wt, where wt wn(0 AR(2) model: zt = 0.1zt1 + 0.342 + wt, where wt wn(0 MA(I) model: zt = wt 0.5wt1, where wt wn(0 MA(2) model: zt = wt 1.1Wt1 + 0.28wt2, where wt wn(0 ARMA(I, 1) model: zt 0.341 + wt + 0.7wt1, where wt wn(0

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