Survival A cohort life table is used to represent the overall mortality rate of the entire lifetime of a certain population.

Assume the number of people who survived until the age of 1 in a certain cohort is 98500 with a probability of death of 0.0002 between the ages of 1 and 4.

a. Find the expected number of deaths to occur between the ages of 1 and 4.

b. Using the normal approximation, find the interval for the possible number of deaths to occur between the ages of 1 and 4 that covers almost all possible values.

c. Find the probability that the number of deaths to occur between the ages of 1 and 4 does not exceed 10.