6) Suppose that 10% of the patients in a clinic are infected with a virus. Also suppose that when a test for this virus is given, 98% of the patients infected with the virus test positive and 97% of the patients not infected with the virus test negative. a. What is the probability that a patient testing positive for the virus is infected? b. What is the probability that a patient testing positive for the virus is not infected? c. What is the probability that a patient testing negative for the virus is infected? d. What is the probability that a patient testing negative for the virus is not infected?