In a survey to assess the adequacy of parking facilities at a shopping precinct a questionnaire was given to local motorists and included the following questions. (a) have you ever driven a car? (b) what is your income group? (c) where do you park? In groups, comment on these questions and formulate other questions which you believe should be in the questionnaire. Would a postal questionnaire within the postal code (zip code) of the supermarket be adequate for the parking survey above? Share your answers.