4.4 Using your EAEF data set, make a graphical representation of the relationship between S and SM using the technique described above, assuming that the true model is as in Exercise 4.2. To do this, regress S on ASVABC and SF and save the residuals. Do the same with SM. Plot the S and SM residuals. Also regress the former on the latter, and verify that the slope coefficient is the same as that obtained in Exercise 4.2.