During the third iteration, the product owner requests another mandatory feature. Similar last-minute requests occurred in the previous two sprints, causing failures and team frustration. What should you do next?

The Product Owner is responsible for managing the product backlog and ensuring the value of the work the Scrum Team performs. By asking the Product Owner to prioritize the backlog with the project team, you facilitate collaboration and ensure that the team understands the rationale behind the new request and its impact on existing work. This approach aligns with Agile principles of transparency and team involvement in planning. Asking the Scrum Team to reprioritize the product backlog is incorrect because backlog prioritization is primarily the Product Owner's responsibility, not the Scrum Team's. Calling an internal meeting to discuss changes and their value is a good step, but it doesn't directly address the prioritization issue or involve the Product Owner in their core responsibility. Adding changes into the final sprint before the first release is a reactive solution that doesn't address the root cause of frequent, last-minute requests and could lead to further sprint failures.