1.10 Smoking habits of UK residents: A survey was conducted to study the smoking habits of UK residents. Below is a data matrix displaying a portion of the data collected in this survey. Note that "E" stands for British Pounds Sterling, "cig" stands for cigarettes, and "N/A" refers to a missing component of the data. sex age marital grossincome smoke | amtWeekends | amtWeekdays Female 42 Single Under $2600 Yes 2 cig/ day 12 cig/day Male 14 Single E10, 400 to $15,600 No N/A N/A Male 53 Married Above $36,400 Yes 6 cig / day 6 cig/ day 1878 Male 40 Single E2600 to E5,200 Yes 8 cig/day 8 cig/ day a) What does each row of the data matrix represent? O a variable an observation b) How many participants were included in the survey? c) Identify each variable, determine whether each variable is numerical or categorical. If the variable is numerical, specify continuous or discrete. If the variable is categorical, specify whether the variable is ordinal or not (i.e. nomial or regular). The variables are sex (regular categorical), age (discrete), marital status (regular categorical), earnings (ordinal), whether or not the individual smokes (regular categorical), amount the individual smokes per day on a weekday (discrete), amount the individual smokes per day on a weekend (discrete) The variables are sex (ordinal), age (continuous), marital status (regular categorical), earnings discrete), whether or not the individual smokes (regular categorical), amount the individual smokes per day on a weekday (discrete), amount the individual smokes per day on a weekend (discrete The variables are sex (regular categorical), age (discrete), marital status (regular categorical) earnings (continuous), whether or not the individual smokes (regular categorical), amount the individual smokes per day on a weekday (discrete), amount the individual smokes per day on a weekend (discrete)