B$.$ Which nodes are stable $($circle answer for each$)?$

Kiosk Check In

Agent Check In

Baggage Weigh $!$n

Baggage Security

ID Check

Initial TSA Screen

Detailed TSA Screen

STABLE

STABLE

NOT STABLE

NOT STABLE

NOT STABLE

NOT STABLE

STABLE

C$.$ From the moment a passenger steps away from the Initial TSA Screen to the moment they arrive at the gate, what is the expected time $($Hint: use a weighted average based on which path they take. So your answer should be $\frac{1}{12}$ times something plus $\frac{11}{12}$ times something else. Your job is to figure out what the "somethings" are.$)$

min

D$.$ What is the mean time between departures from the Baggage Weigh In station? $($Hint: should rate in $=$ rate out in this situation? Have you been asked for a rate or a time? Do you need to convert?$)$

One minute

E$.$ The Baggage Security station has a limited amount of space for people to put their