Problem 18-4

The following information pertains to telephone calls to a motel switchboard on a typical Tuesday. UseTable 1.

Period	Incoming Rate (calls per minute)	Service Rate (calls per minute per operator)	Number of Operators
Morning	1.8	1.5	2
Afternoon	2.2	1.0	3
Evening	1.4	0.7	3

a.	Determine the average time callers wait to have their calls answered for each period and the probability that a caller will have to wait for each period.(Round intermediate calculations and final answers to 3 decimal places.)

Period	Pw
Morning
Afternoon
Evening

b.	Determine the maximum line length for a probability of 96 percent.(Round your intermediate calculations to 3 decimal places and round up your final answers to the next whole number.)

Period	Lmax
Morning
Afternoon
Evening