Problem $18-9$

One field representative services five customers for a computer manufacturer. Customers request assistance at an average $($Poissondistributed$)$ rate of once every four working days. The field representative can handle an average $($Poisson$-$distributed$)$ of one call per day. Determine: Use Table $1.$

a$.$ The expected number of customers waiting. $($Round your answer to $3$ decimal places.$)$

Expected number of customers waiting

b$.$ The average length of time customers must wait from the initial request for service until the service has been completed. $($Round your answer to $2$ decimal places.$)$

Average length of time $$ days

c$.$ The percentage of time the service rep will be idle. $($Round your answer to $1$ decimal place.$)$

Percentage of Idle time $$

d$.$ By how much would your answer to part a be reduced if a second field rep were added? $($Round your answer to $3$ decimal places.$)$

Reduced number of customer$($s$)$