Consider the following features for a Customer Relationship Management (CRM) SaaS app. Identify which two are potential core product-side levers that can significantly improve retention rates:
    - Lever I: Integrating AI-driven predictive sales analytics.
    - Lever II: Implementing real-time notifications for sales updates.
    - Lever III: Including gamification elements like sales competitions.
- Lever IV: Offering customizable data reports for different team roles.