Help me apply Entity–relationship modeling to the material below.
Reader and existing knowledge: [describe]
Task and desired outcome: [describe]
Use these principles: Identify entities and their identities.; Name relationships and specify minimum and maximum participation.; Separate a conceptual relationship from its storage implementation..
Preserve source facts, identifiers, quantities, conditions, exceptions, and uncertainty.
Separate supplied facts from assumptions. Ask for missing information instead of inventing it.
Explain your representation choices and provide a review checklist. Do not claim formal compliance or correctness from formatting alone.
Material: [paste only information you are permitted to share]