Please help me see the Excel formulas that I need in order to solve the problem and questions below. It is a queuing and simulation problem. Thank you!

Queueing models
Arrival rate	7 per day
Service rate	80 mins
Number of servers	1
Average server utilization
Average number of customers in the queue (Lq)
Average number of customers in the system (L)
Average waiting time in the queue (Wq) express in days, hours and minutes.
Average waiting time in the system (W) ) express in days, hours and minutes.
Probability there is 0 units in the system (P0)
Probability of "n" units in system with to up to .
Probability of more than "n" units in system with to up to .
Determine what the minimum Service Rate in customers per day should be for February, in order to maintain or improve the average waiting time (Wq) for the rest of the year.