Question 7 5 pts A pull request allows all changes to a repository to flow through a central person / group that looks at the changes and either merges them or doesn't. Why might a large repository implement a PR workflow instead of just giving people the ability to commit changes and rolling back and changes that were not helpful? PRs are the only way to track people's contributions Constantly having to revert commits may become overwhelming if there are a lot of contributers. In git it is impossible to rollback commits. D Question 8 5 pts The databases that can be used for this project are of which type? No-SQL databases O relational SQL databases graph databases No database needed! Just the ole pile-of-files