A team member has encountered a technical issue similar to the one faced in a successfully closed project However, the team member did not know about the previous project arte would like to resolve the issue on their own What should the project manager do?

A project manager is happy to have a motivated, highly talented team working together in a cheerful atmosphere. However, many members of the team are distracted by their telephones during meetings, show up late, or interrupt one another by telling jokes.
What should the project manager do first?

Which stakeholder approves a project's result?

Project or phase closure guidelines or requirements, historical information, and the lessons learned knowledge base are examples of which input to the Close Project or Phase process?

The team is in the process of validating that the quality plan for the project will measure sufficiently the product of the project. What are the team members doing?