Table E11-3 presents the highway gasoline mileage performance and engine displacement for DaimlerChrysler vehicles for model year 2005 (U.S. Environmental Protection Agency).

(a) Fit a simple linear model relating highway miles per gallon (y) to engine displacement (x) in cubic inches using least squares.

(b) Find an estimate of the mean highway gasoline mileage performance for a car with 150 cubic inches engine displacement.

(c) Obtain the fitted value of y and the corresponding residual for a car, the Neon, with an engine displacement of 122 cubic inches.