Suppose that a test for opium use has a 2% false positiverate and a 5% false negative rate. That is, 2% of peoplewho do not use opium test positive for opium, and 5% ofopium users test negative for opium. Furthermore, sup-pose that 1% of people actually use opium. a)Find the probability that someone who tests negativefor opium use does not use opium. b)Find the probability that someone who tests positivefor opium use actually uses opium.