The random variable represents the number of software help requests received at a help desk in one hour, and it has a Poisson distribution with a mean of 13.1.
a) Calculate the probability of receiving exactly 10 help requests in one hour
b) Find the standard deviation of the number of help requests in one hour
c) Determine the median number of help requests in one hour
d) Calculate the interquartile range of the number of help requests in one hour