(c) Suppose a particular drug test is 99% sensitive and 98% specific. The null hypothesis Ho is that the subject is not using the drug. Assume a prevalence of 70 = 99.5%, i.e. only 0.5% of people use the drug. Consider a randomly selected individual undergoing testing. Rounding to the nearest three significant figures, find (i) the probability of testing positive given Ho. (ii) the probability that they are not using the drug given they test positive. (iii) the probability of testing positive a second time given they test positive once. You may assume the two tests are statistically independent given drug user status