The numbers for the $2$ and $3$ server models are not tied to formulas in the file you were given, but the numbers in the single server model are tied to the formulas you have input. It should now be easy for you to input new arrival and service rates and then find the new outputs for the single server model.

$21.$ Plug in these numbers into your spreadsheet:

Arrival rate: $0\mathrm{.}065$ calls per minute Service rate: $0\mathrm{.}085$ calls per minute In a single$-$server model what is the time in line $($Minutes$)?$

$22.$ Plug in these numbers into your spreadsheet:

Arrival rate: $4\mathrm{.}5$ calls per minute Service rate: $6\mathrm{.}7$ calls per minute In a single$-$server model what is the time in line $($Minutes$)?$

$23.$ 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?

Use cells B$2$ and B$3$ to calculate Lambda and Mu$.($Example: $=7/45)$