2.7. Explain why estimating the effort required to complete a product backlog item using person-hours or person-days may lead to significant variations between the estimated effort and the actual effort. 2.8. Why are daily scrums likely to reduce the time that is normally required for new team members to become productive? 2.9. One problem with self-organizing teams is that more experienced team members tend to dominate discussions and therefore influence the team's way of working. Suggest ways to counteract this problem. 2.10. Scrum is designed for use by a team of five to eight people working together to develop a software product. What problems might arise if you try to use Scrum for student team projects in which members work together to develop a program? What parts of Scrum could be used in this situation