A study concluded that among people infected with Cytomegalovirus (CMV), 98.1% of tests were correctly positive, while for people not infected with the virus, 97.6% of the tests were correctly negative. We also know that 20% of people carry the virus. a) What is the probability that a randomly selected person tests negative for CMV? b) What is the probability that a randomly selected person testing negative for CMV is truly CMV free