1.9 Survey of customers.

A survey of customers of a restaurant near your campus wanted opinions regarding the following variables: (a) quality of the restaurant; (b) portion size; (c) overall satisfaction with the restaurant; (d) respondent’s age; (e) whether the respondent is a college student; (f) whether the respondent ate there at least once a week. Responses for items (a), (b), and (c) are given a scale of 1 (very dissatisfied) to 5 (very satisfied). Classify each of these variables as categorical or quantitative, and give reasons for your answers.