8. [-13 Points] DETAILS $0 / 2$ Submissions Used Assume that the age at onset of a certain disease is distributed normally with a mean of 50 years and a variance of $245.86$ years. a) What is the probability that an individual afflicted with the disease developed it before age 30 ? probability = b) What is the probability that an individual afflicted with the disease developed it after age 43 ? probability = c) What is the probability that an individual afflicted with the disease developed it between ages 30 and 43 ? probability = SP.VS.836