Patients arrive at Max hospital for X-ray according to a Poisson
process. There is an X-ray machine and arriving patients form a
single line that feeds the X-ray machine in a
first-come-first-served order. Past data show that the average wait
for a patient is 30 minutes. The service time in the process takes,
on an average, 10 minutes, exponentially distributed. a)Average
number of patients in the system b)Average number of patients in
the queue c)Average time a patient spends in...