6.4. Draw diagrams showing a conceptual view and a process view of the architectures of the following systems:

An automated ticket-issuing system used by passengers at a railway station.

A computer-controlled video conferencing system that allows video, audio, and computer data to be visible to several participants at the same time.

A robot floor cleaner that is intended to clean relatively clear spaces such as corridors. The cleaner must be able to sense walls and other obstructions.