Listed is a series of experiments and associated random variables. In each case, identify the values that the random variable can assume and state whether the random variable is discrete or continuous.

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Experiment a. Take a 20-question examination b. Observe cars arriving at a tollbooth for 1 hour Number of cars arriving at tollbootlh Random Variable (r) Number of questions answered correctly Number of returns containing errors Number of nonproductive hours in an c. Audit 50 tax retums d. Observe an employee's work eight-hour workday Number of pounds e. Weigh a shipment of goods