The Taj Service Station has a central store where service mechanics arrive to take spare parts for the jobs they work upon. The mechanics wait in queue if necessary and are served on a first-comefirst-

served basis. The store is manned by one attendant who can attend 8 mechanics in an hour on an average. The arrival rate of the mechanics averages 6 per hour. Assuming that the pattern of mechanics'

arrivals is Poisson distributed and the servicing time is exponentially distributed, determine W8 , Wq and Lq where the symbols carry their usual meaning.