Problem 1: The "car data" (on sakai) are observations of cars sold in the North American market. Five variables were collected for each car: Weight, Disp. (the engine displacement in liters), Mileage, Fuel, and Type. 1) Fit the following regression model: Mileage = a + bl * weight + b2 * Disp + b3*Fuel + b4*Type+ error [Hint: Use PROC GLM rather than PROC REG and use the class statement in GLM. Report the coefficient estimates and check the estimated coefficients by adding the "solution" option to the MODEL statement.]