Customers arrive at the drive-up window of a fast-food restaurant at a rate of 2 per minute during the lunch hour.
a. What is the probability that the next customer will arrive within 1 minute?
b. What is the probability that the next customer will arrive within 5 minutes?
c. During the dinner time period, the arrival rate is 1 per minute. What are your answers to (a) and (b) for this period?