The US Department of Transportation reports that there were 6,323,000 highways “crashes” (accidents involving one or more vehicles) in the US in a recent year. This means an average of 12 per minute or .2 crashes per second. Assume that these averages are still in effect and that all the Poisson conditions are met. Use the Poisson table to find the probability of
a. Exactly one crash in a randomly selected second.
b. No more than two crashes in the next second.
c. Exactly three crashes in the next half-minute.
d. Between one and three crashes in the next 20 seconds.