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Q1 (5 points) Suppose random variables { X} with yx (h) = cov(Xt, Xith) is independent of t, but E[X ] = 4t Calculate :

Q1 (5 points) Suppose random variables { X} with yx (h) = cov(Xt, Xith) is independent of t, but E[X ] = 4t Calculate : (a) Is {X} stationary? (b) Let Yt =7 - 4t + Xt, is {Y} stationary

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