Recall our model of Queueing Theory$/$Waiting Line Analysis from class. Students must have their schedule approved by an academic advisor. It takes the advisor an average of $5$ minutes to approve a schedule. Students arrive at the advisor's office at a rate of $4$ per hour. How many students are at the advising office $($waiting and being served$)$ on average in the steady state? Group of answer choices$2\mathrm{.}52\mathrm{.}01\mathrm{.}01\mathrm{.}50\mathrm{.}5$