What are some questions or points I should cover when writing about the 7 information processes in an Information and context diagram?

The forerunner to cell phones, pdas, and smartphones was

Description: write function lastfirst() that takes one argument—a list of strings of the format "lastname, firstname" —and returns a list consisting of two lists: (a) a list of all the last names (b) a list of all the first names

Technician a says engine assemblies can be mounted longitudinally in a chassis. technician b says engine assemblies can be mounted transversely in a chassis. who is correct?