Final answer:
As part of ICS demobilization, the tasks include signing out all responders, accounting for equipment, conducting debriefings, and completing incident documentation.
Step-by-step explanation:
The tasks that should be completed as part of the Incident Command System (ICS) demobilization process include ensuring that all responders have signed out (not signed in), accounting for all equipment and resources, conducting interviews or debriefings with demobilizing personnel, and ensuring that all incident-related documentation is completed. None of the options provided (a, b, c, d) are directly related to the demobilization phase. Demobilization is the orderly, safe, and efficient return of an incident's resources to their original location and status before the incident occurred.