$56.$ In both Chapters $1$ and $2,$ examples of restaurants and fast$-$food chains were used to describe business processes, as they are deemed to be readily familiar to many students. On the basis of your experiences from using the drive$-$through window at a fast food chain, prepare each of the three listed pictorial representations of the food$-$ordering and delivery processes. Your drawings should portray the restaurant's perspectivethat is processing a sales transaction via the drivethrough window.

a$.$ Process map

b$.$ Document flowchart

c$.$ Data flow diagram