Airline fatalities. Over the past 10 years, US airlines average about 1 fatality per month (US Department of Transportation, National Transportation Statistics: 2019). Assume that the probability distribution for x, the number of fatalities per month, can be approximated by a Poisson probability distribution.

a. What is the probability that no fatalities will occur during any given month?

b. What is the probability that one fatality will occur during a month?

c. Find E1x2 and the standard deviation of x.