ch e"6, There is a probability of 0.08 that a vaccine will cause a certain side effect. Suppose that a number of patients are inoculated with the vaccine. We are interested in the number of patients vaccinated until the first side effect is observed. a) Find the probability that exactly 5 patients must be vaccinated in order to observe the first side effect. b) Find the probability that we observe a patient with side effects within the first 8 patients. c) What is the expected number of patients until the first patient has side effects?

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