$3\mathrm{.}33$ pts

Fast$-$Food Drive$-$Thru

A customer at a busy fast$-$food drive$-$thru waits in line in his car to approach the menu where he places his order. Once the order is placed, the customer pulls forward and waits in line again to approach the first window where he will pay. After paying, the customer pulls forward and waits in line a third time to pick up his order at the second window.

The fast$-$food restaurant has one ordering menu station, one pay window, and one order pickup window.

Which type of waiting line structure does the Fast$-$Food Drive$-$Thru use?

Mulitple Channel, Multiple Phase

Multiple Channel, Single Phase

Single Channel, Multiple Phase

Single Channel, Single Phase