Small CRM Database Schema

Design a normalized CRM schema for contacts, organizations, opportunities, activities and ownership.

Create design a normalized crm schema for contacts, organizations, opportunities, activities and ownership.

Use these inputs:
- sales process: [sales process]
- user roles: [user roles]
- reporting questions: [reporting questions]

Return the finished result first. Then add a short assumptions note and three practical improvements. Do not invent facts, research, testimonials or results. If one essential detail is missing, use the safest reasonable assumption and label it instead of restarting with a long questionnaire.