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5.7 Consider the time series model yt = 20 + t + 0.2t1 a. Is this a stationary time series process? b) Calculate and plot

5.7 Consider the time series model yt = 20 + t + 0.2t1

a. Is this a stationary time series process?

b) Calculate and plot the theoretical ACF for y_t. Does the ACF cut off at somewhere?( Can i get R code for this pleae)

c. What is the mean of the time series?

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