The lifespan of individuals of a certain animal species has a normal distribution with a mean of 8.8 months and a standard deviation of 3 months.\ a) (1 point) What percentage of individuals of this species exceed 10 months? What percentage of individuals have lived between 7 and 10 months?\ b) (1 point) If 4 specimens are randomly selected, what is the probability that at least one does not exceed 10 months of life?\ c) ( 0.5 points) What value of $c$ is such that the interval ( $8.8 - c , 8.8 + c$ ) includes the lifespan (measured in months) of $98 \%$ of the individuals of this species?
The lifespan of individuals of a certain animal species has a normal distribution with a mean of 8.8 months and a standard deviation of 3 months.\
a) (1 point) What percentage of individuals of this species exceed 10 months? What percentage of individuals have lived between 7 and 10 months?\
b) (1 point) If 4 specimens are randomly selected, what is the probability that at least one does not exceed 10 months of life?\
c) ( 0.5 points) What value of $c$ is such that the interval ( $8.8 - c , 8.8 + c$ ) includes the lifespan (measured in months) of $98 \%$ of the individuals of this species?