Classify each random variable as discrete or continuous.
a. The number of boll weevils in one acre of a Louisiana cotton farm.
b. The volume of ice cream in one scoop.
c. The area of a randomly selected baseball field including foul territory.
d. The number of late deliveries in one month by a package delivery service e. The number of girls born in a rural hospital during the next year.
f. The interest rate on a savings account at a randomly selected bank in Philadelphia.
g. The number of tickets sold in the next Powerball lottery.
h. The number of oil tankers registered to a certain country at a given time.