Classify each of the following variables as numerical or categorical, discrete or continuous, ordinal or nominal.
a. The postcode of suburbs
b. Eye colour (brown, blue, ...)
c. Whether a person drinks alcohol (yes, no)
d. Length of cucumbers (in centimeters)
e. Number of cars in a car park
f. Salary (high, medium, low)
g. Salary (in dollars and cents)
h. Daily temperature in °C
i. Shoe size (6, 8, 10, ...)