Arrival Rate $($per hour$)101010$

Service Rate$($per hour$)151515$

Average Time it takes to serve one customer $($in minutes$)4\mathrm{.}00$

How often does a customer arrive $($in minutes$)6\mathrm{.}00$

Servers $123$

$\%$ Time Server Busy $($rho$)0\mathrm{.}6670\mathrm{.}3330\mathrm{.}222$

Probability of

$033\mathrm{.}3\%50\mathrm{.}0\%51\mathrm{.}2\%$

$122\mathrm{.}2\%33\mathrm{.}3\%34\mathrm{.}1\%$

$214\mathrm{.}8\%11\mathrm{.}1\%11\mathrm{.}4\%$

$39\mathrm{.}9\%3\mathrm{.}7\%2\mathrm{.}5\%$

$46\mathrm{.}6\%1\mathrm{.}2\%0\mathrm{.}6\%$

$54\mathrm{.}4\%0\mathrm{.}0\%0\mathrm{.}1\%$

$62\mathrm{.}9\%0\mathrm{.}0\%0\mathrm{.}0\%$

In the system

CUSTOMERS CUSTOMERS CUSTOMERS

Number in System n$($s$)2\mathrm{.}000\mathrm{.}750\mathrm{.}676$

Number in Line n$($l$)1\mathrm{.}330\mathrm{.}080\mathrm{.}009$

TIME $($Minutes$)$ TIME $($Minutes$)$ TIME $($Minutes$)$

Time in System t$($s$)12\mathrm{.}0004\mathrm{.}5004\mathrm{.}056$

Time in Line t$($l$)8\mathrm{.}0000\mathrm{.}5000\mathrm{.}056$Find RHO for a four server model.