customer arrive at a two server system at poisson rate 3 per hour.an arrival finding the system empty is equally likely to enter service with either server.an arrival finding one cusomer in the system will enter service with the idele server.an arrival finding two others in the system will wait in the line for the first free server.an arrival finding three in the system will not enter.all service times are exponential with rate one per hour,and once a customer is served(by either one) he will departs the system.

A) what is the average number of customers in the station?
B)what is the average amount of time that an entire customer spends in the station?