Please analyze and answer the Chapter $11$ Objective Question #$17$National State Bank$($p$295)$ using Excel

$($an Excel template file is enclosed$).$

The National State Bank is trying to make sure it has enough tellers to handle the Friday afternoon rush of

workers wanting to cash their paychecks. It is only concerned with the last hour of the day from $4$:$00$ to

$5$:$00$ p$.$m$.$ It takes $5$ minutes per customer to be processed by the tellers. The average customer arrivals are

shown in the following table.