How would you characterize the traffic light queue $(\frac{M}{M}\frac{?}{1},\frac{G}{G}\frac{?}{1},$ etc$)?$ What is the

average number of vehicles in the lane $($in the line plus at the light$)$ waiting to merge into the

freeway? $($Hint: think about the "exponentially distributed" interarrival times and "precise"

service times.$)$