Problem 9 A screening test for a certain virus is prone to giving false positives or false negatives. If a patient being tested has the virus, the probability that the test indicates a {false} negative is 0.1 2. If the patient does not have the virus, the probability that the test indicates a {false} positive is 0.1 5. Assume that 8 95 of the patients being tested actually have the virus. Suppose that one patient is chosen at random and tested. Find the probability that: Problem 9a. this patient does not have the virus and tests negative. Show all your work. [2 marks]