Use cells B2 and B3 to calculate Lambda and Mu. (Example: = 7/45)
Lambda - Arrival Rate (Calls per Minute)
Mu - Service Rate(Calls per Minute)	0.1670
Servers	1	2	3
% Time Server Busy (rho)	0.000	#DIV/0!	Y
Probability of
0	Y	0.503	0.515
1	Y	0.333	0.341
2	Y	0.110	0.113
3	Y	0.036	0.025
4	Y	0.012	0.005
5	Y	0.0003	0.001
6	Y	0.00003	0.0003
In the system
	CUSTOMERS	CUSTOMERS	CUSTOMERS
Number in System n(s)	Y	0.74	0.67
Number in Line n(l)	Y	0.08	0.01
	TIME (Minutes)	TIME (Minutes)	TIME (Minutes)
Time in System t(s)	Y	4.83	4.36
Time in Line t(l)	Y	0.53	0.06
	TIME (Seconds)	TIME (Seconds)	TIME (Seconds)
Time in System t(s)	Y	289.7	261.5
Time in Line t(l)	Y	31.7	3.5

Please show me how to fill this out & the numbers you get. i am having a hard time 3

The purpose of this exercise is to discuss the situation facing a manager and help her determine how many servers to use and what the characteristics of the system will be. Endeavor Communications, a long distance provider, is reevaluating its account management department for handling customer service questions and requests. During the 2:00 pm to 10:00pm time period, past data show that calls to the account management department occur at an average rate of one call every 6.5 minutes. A study of past service times indicate that the average time to process a caller's question/request is 4.3 minutes. Like other phone systems, when a call comes in and all the servers are busy, the caller hears a message telling them to hold until the next server is available. Top management at Endeavor Communications understands that the staffing decision involves the analysis of trade-offs. Increasing the number of servers will reduce the waiting times and increase the probability of immediate service at a higher cost with more idle time for the servers. Management has decided that the GOAL of the account management department is to immediately answer and service at least 90% of the incoming calls during the busiest time period of 2:00pm to 10:00pm. They have asked you to determine the staffing level that will help them meet this goal. Also, they'd like you to provide your own recommendations