A group of 165 doctors and nurses volunteered to run a health fair. Each volunteer worked one shift. The table below summarizes the data on the volunteers and their shifts. Morning Afternoon Evening Suppose a volunteer from the health fair is chosen at random. Answer each part. Do not round intermediate computations, and round your answers to the nearest hundredth. (If necessary, consult a list of formulas.) (a) What is the probability that the volunteer is a doctor, given that the volunteer worked the X S 9 morning shift? ' [l] (b) What is the probability that the volunteer is a nurse or worked the afternoon shift? I]