Ramesh Srinivasan decides to install an automatic coffee vending machine outside his coffee shop to reduce the number of people standing in line inside. Srinivasan charges $3.50 per cup. However, it takes too long for people to make change. The service time is a constant 4.00 minutes, and the arrival rate is 12 per hour (Poisson distributed). a) The average wait time in the line = minutes. (Round your response to two decimal places.) b) The average number of customers waiting in the line = customers. (Round your response to three decimal places.) c) Srinivasan raises the price to $5 per cup and takes 60 seconds off the service time. However, because the coffee is now so expensive, the arrival rate drops to 9 per hour. The average wait time in the line = minutes. (Round your response to two decimal places.) The average number of customers waiting in the line = customers. (Round your response to three decimal places.)