For the Houses data file at the text website, Table 13.17 shows results of modeling y = selling price (in dollars)

in terms of size of home (in square feet) and whether the home is new (1 = yes; 0 = no).

(a) Report and interpret the prediction equation, and form separate equations relating selling price to size for new and for not new homes.

(b) Find the predicted selling price for a home of 3000 square feet that is (i) new, (ii) not new.