New PMP Question & Answers with explanation

A project manager is working on a large project with numerous onsite and offsite team members. These team members also work on multiple other projects, which makes team updates challenging. The project manager is beginning to feel out of touch with the team. What should the project manager do?
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A geographically dispersed team must implement an enterprise-wide system with an aggressive schedule. Some team members have web cameras and others have internet connectivity issues. In order to manage the team's varied media options, what plan should the project manager reference?
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A project team has fallen behind schedule on some tasks. The project manager tries to fix the issue by reprioritizing a few subsequent tasks. This does not resolve the scheduling problem, and the project manager must now escalate the issue to the project's stakeholders. To what plan should the project manager refer to escalate this?
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Without a project manager's knowledge, an unofficial communications platform on social media was established to ensure effective communication among team members. The project manager learns that the platform is being used inappropriately. What should the project manager do?
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During the execution phase of a software development project, several overseas developers join the team. What should the project manager update first?
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