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Please explain why below is the answer by showing step by step solution thanks Question 26 0 / 5 pts Let Xt be a stationary

Please explain why below is the answer by showing step by step solution thanks

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Question 26 0 / 5 pts Let Xt be a stationary process and Yt = (a + bt) st + Xwhere st is a seasonal component with period 4. Which of the following model represents a stationary time series? O \\(1-B) Y_t l1) u Answered O (1 - BA) Yt Orrect Answer O \\((1-B~4) ^2Y_t 11) O (1 -B)' Y

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