From the bivariate distributions in Chapter 7:

(a) Collect the regression functions which are: (i) linear in the conditioning variable,

(ii) linear in parameters, and (iii) the intersection of (i) and (ii).

(b) Collect the skedastic functions which are: (iv) homoskedastic, (v) heteroskedastic.

(c) In light of your answers in

(a) and (b), explain how typical is the Normal, linear regression model.