Autos arrive at a toll plaza located at the entrance to a bridge at a rate of 50 50 per minute during the 5:00-to-6:00 P.M. hour. Determine the following probabilities assuming that an auto has just arrived. a. What is the probability that the next auto will arrive within 3 3 seconds ( 0.05 0.05 minute)? b. What is the probability that the next auto will arrive within 1 1 second second ( 0.0167 0.0167 minute)? c. What are the answers to (a) and (b) if the rate of arrival of autos is 60 60 per minute? d. What are the answers to (a) and (b) if the rate of arrival of autos is 30 30 per minute?