Neve Commericial Bank is the only bank in the town of York, PA. On a typical Friday, an average of 8 customers per hour arrive at the bank to transact business. There is one teller at the bank, and the average time requied to transact business is 4 minutes. It is assumed that service times may be described by the exponential distribution. A single line would be used, and the customer at the front of the line would go to the first available bank teller. If a single teller is used:

A) The average time in the line = __ min

B) The average in the line = __ customers

C) The average time in the system= ___ min

D) The average number in the system= ___ customers

E) The probability that the bank is empty= ____