Students in an introductory statistics course were asked the following questions as part of a class survey: (1) What is your gender: Male, Female, Gender diverse/other/prefer to not say? (2) On average, how many hours of sleep do you get per night? (3) What is your bedtime: 8pm-10pm, 10pm-12am, 12am-2am, later than 2am? (4) How many countries have you visited? (5) On a scale of 1 (not very useful) - 5 (very useful), how useful did you find the orientation session? a) Identify the variables in the survey. b) Classify each variable as numerical or categorical. c) For each numerical variable, identify whether it is continuous or discrete. For each categorical variable, identify whether it is nominal or ordinal