Classify each of the following variables as either categorical or numerical.
a. Number of text messages sent by a college student in a typical day
b. Amount of time a high school senior spends playing computer or video games in a typical day c. Number of people living in a house
d. A student’s type of residence (dorm, apartment, house)
e. Dominant color on the cover of a book
f. Number of pages in a book
g. Rating (G, PG, R, X) of a movie