A single server queuing system with a Poisson arrival rate and exponential service time has an average arrival rate of 7 customers per hour and an average service rate of 16 customers per hour. What is the probability that a customer waits 5 minutes or more in the line? O a. 0.2067 O b. 0.4375 O c.0.5625 O d. 0.7933 Tourists stop at an information desk at a rate of one every 60 minutes, and answering their questions takes an average of 10 minutes each. There are 7 employees on duty. If a tourist isn't served immediately, how long on average would the tourist have to wait for service? O a. 3 minutes O b. 6 minutes O c. 2.88 minutes O d. 7.5 minutes Customers arrive at a suburban ticket outlet at the rate of 14 per hour on Monday mornings. This can be described by a Poisson distribution. Selling the tickets and providing general information takes an average of 3 minutes per customer, and varies exponentially. Determine average time in line and average time in the system. Select one: O a. Average time in line 3 minutes and average time in the system 6 minutes O b. Average time in line 4 minutes and average time in the system 7 minutes Average time in line 7 minutes and average time in the system 10 minutes O d. Average time in line 2 minutes and average time in the system 5 minutes