Customers arrive as a Poisson input process at a rate of 6 per hour. To serve a customer, there is one server, who has to complete 3 tasks in sequence. The time to complete the first task follows an exponential distribution of mean 4 minutes. The time to complete the second task follows a Weibull distribution of mean 3 minutes and standard deviation 2 minutes, and is independent of the task-1 time. The time to complete the third task is 2 minutes.

Determine the 4 measures of performance L,W,Lq,Wq of the queueing system