$23.)$

Use cells B$2$ and B$3$ to calculate Lambda and Mu$.($Example: $=7/45)$Plug in these numbers into your spreadsheet:

Arrival rate: $0\mathrm{.}083$ calls per minute Service rate: $0\mathrm{.}206$ calls per minute In a single$-$server model what $\%$ of time is the server busy?

$24.$ Plug in these numbers into your spreadsheet:

Arrival rate: $2\mathrm{.}4$ calls per minute Service rate: $2\mathrm{.}5$ calls per minute In a single$-$server model what is the time in the system $($Minutes$)?$

$25.$ Plug in these numbers into your spreadsheet:

Arrival rate: $0\mathrm{.}349$ calls per minute Service rate: $0\mathrm{.}411$ calls per minute In a single$-$server model what is the average number of customers in the line?

$26.$ Plug in these numbers into your spreadsheet:

Arrival rate: $0\mathrm{.}45$ calls per minute Service rate: $0\mathrm{.}98$ calls per minute In a single$-$server model what is the average number of customers in the system?

$27.$ Plug in these numbers into your spreadsheet:

Arrival rate: $5\mathrm{.}2$ calls per minute Service rate: $6\mathrm{.}05$ calls per minute In a single$-$server model what is the average number of customers in the line?