Using pacf() and ar.yw() or ar.mle(), verify that the following models from Chapter 13 are, indeed, quite plausibly AR(1). That is, the residuals are AR(1) after fitting the signal: (i) the logging...

Using pacf() and ar.yw() or ar.mle(), verify that the following models from Chapter 13 are, indeed, quite plausibly AR(1). That is, the residuals are AR(1) after fitting the signal: (i) the logging data, (ii) the global warming data, (iii) the Semmelweis data, (iv) the adjusted NYC temperatures, (iv) Boise riverflow data (with at least three pairs of periodic functions).