The release burndown chart indicates that it will take 5 more two-week sprints to finish the project, assuming no change in the team's productivity. This means the project will end later than the release date previously announced to stakeholders. What is the best option for the product owner?

1. Reduce the sprint length to one week

2. Reduce the scope by moving low-priority user stories to the next release with the approval of key stakeholders

3. Negotiate with customers to accept lower-quality work

4. Send an announcement to stakeholders informing them of the delay

5. Increase the work schedule by using overtime and weekends