Question: Classify each random variable as either discrete or continuous.
a. The number of patrons arriving at a restaurant between 5:00 p.m. and 6:00 p.m.
b. The number of new cases of influenza in a particular county in a coming month.
c. The air pressure of a tire on an automobile. d. The amount of rain recorded at an airport one day.
e. The number of students who actually register for classes at a university next semester.