Question: 18. This question refers to Problem 17. Compute the first differences of the quarterly loan data for Dominion Bank. a. Compute the autocorrelation coefficient for

18. This question refers to Problem 17. Compute the first differences of the quarterly loan data for Dominion Bank.

a. Compute the autocorrelation coefficient for time lag 1 using the differenced data.

b. Use a computer program to plot the differenced data and compute the autocorrelations for the differenced data for the first six time lags. Is this time series stationary?

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