26. Refer to Problem 25. The default multiplicative decomposition in Minitab assumes a linear trend. Plot the employed men data in Table P-25 and examine the years 1993–2000 and 2001–2003. Is a linear trend appropriate? If not, can you suggest a trend curve that might be appropriate? Fit your suggested trend curve and store the residuals. Compute the autocorrelation function of the residuals. Do the residual autocorrelations suggest a seasonal component? Explain.