In the Journal of Transportation Engineering (June 2005), the number of non-home-based trips per day taken by drivers in Korea was modeled using the Poisson distribution with λ = 1.15.

a. What is the probability that a randomly selected Korean driver will take no more than two non-home-based trips per day?
b. Find the variance of the number of non-home-based trips per day taken by a driver in Korea.
c. Use the information in part b to find a value for the number of non-home-based trips that the driver is not likely to exceed.