5. Compute a multiple regression model using number of times drunk as the dependent variable. Use age, sex, race, employment status, hours spent studying per week, grade point average, and number of friends who use alcohol as the independent variables. (a) Use an F-test to test whether demographic characteristics—age, sex, and race—affect drinking behavior. (b) Use an F-test to test whether academic characteristics—hours spent studying per week and grade point average—affect drinking behavior.