Five administrative assistants use an office copier. The average time between arrivals for each assistant is $44$ minutes, which is equivalent to an arrival rate of

$1$

$44$

arrivals per minute. The mean time each assistant spends at the copier is $8$ minutes, which is equivalent to a service rate of

$1$

$8$

per minute. Use the M$/$M$/1$ model with a finite calling population to determine the following.