Question $4$: This question relates to Little's Law

$($a$)$ At Chipotle's on the Drag, there are $20$ people in line in front of you waiting

for their burrito? A customer gets their burrito and leaves the line every

$40$ secs$.$ What is the flow rate $($throughput$)$ in customers$/$minute$?$

$($b$)$ What is the average time in minutes it will take to get to start getting your

burrito made?