Using the Birth Weight data set with the response variable LOW, fit the model logit(????) = ????0 + ????1AGE + ????2 LWT + ????3 SMOKE and then

(a) test the goodness-of-fit for this model.

(b) create and interpret a plot of the standardized residuals versus the observation index.

(c) create and interpret a plot of Δ????2 versus the observation index.

(d) create and interpret a plot of Δ???? versus the observation index.