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could you tell me what the correct options for these problems ? Please explain Find the order of the ARIMA process: Xt = 1.2Xt-1 +

could you tell me what the correct options for these problems ? Please explain

Find the order of the ARIMA process: Xt = 1.2Xt-1 + 0.3Xt-2 - 0.2Xt-3 + et + 0.let-1, where Xt denotes a stationary time series and et denotes the corresponding error terms. Key A ARIMA(3,0, 1) B ARIMA(3, 1, 1) C ARIMA(2, 1, 1) D None of the above

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