Determine whether the random variable is discrete or continuous. In each case, state the possible values of the random variable.
(a) The amount of rain in Seattle during April.
(b) The number of ﬁsh caught during a ﬁshing tournament.
(c) The number of customers arriving at a bank between noon and 1:00 p.m.
(d) The time required to download a ﬁle from the Internet.