A project manager is monitoring team performance by comparing committed versus completed work.

The number of items in the backlog can be determined by looking at the “Commitment” column for each sprint in the provided chart. For Sprint 5, there is a commitment of completing 23 items, which is the highest among all sprints. This indicates that there are at least 23 items in the backlog to be worked on. This is consistent with the concept of agile project management, which allows for changes and additions to the project scope based on customer feedback and changing requirements. References = CompTIA Project+ PK0-005 Certification Study Guide, Chapter 14: Agile Project Management, page 321. CompTIA Project+ Cert Guide: Exam PK0-005, Chapter 9: Agile Project Management, page 287