A cross-functional AI product needs business ownership, technical delivery, and risk review. Which two operating-model choices are appropriate? Select 2 answers.

1. Treat an informal volunteer as the permanent undocumented incident owner.
2. Give the vendor sole ownership of the company business objectives.
3. Make every participant accountable for everything with no decision authority.
4. Assign an accountable business owner for outcomes and workflow decisions.
5. Define technical, data, security, and review responsibilities with clear decision and escalation paths.