The scrum master needs to schedule a meeting with a candidate product owner to create a business case for an important project, but the candidate says they don't have time to work on the project. The candidate product owner has the best knowledge of the solution environment. What should the scrum master do?

1. Creating a business case based on recently completed projects

2. Emphasize the importance of working together on the scope and vision of the solution before starting the project

3. Go to the candidate product owner's manager and gain their support

4. Developing the business case and send it to the candidate product owner for their review and approval

5. Delaying the business case development work until the candidate product owner is available