Identify the variable as a discrete or a continuous random variable in parts (a)-(e).
(a) The loss of weight following a diet program.
(b) The magnitude of an earthquake as measured on the open-ended Richter scale.
(c) The seating capacity of a roller coaster.
(d) The number of cars sold at a dealership on one day.
(e) The amount of electricity produced at a wind farm next-Friday.