New PMP Question & Answers with explanation

A project team successfully achieved a key milestone. To do this, the team met critical technical requirements on a new process, and then used the process to develop the first of several similar deliverables. What should the project manager do next?
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A project to migrate an organization's email system to another platform creates an unexpected, but significant, issue on another business-critical system. What should the project manager do?
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Sharing of project information is of utmost importance to the organization. Project knowledge is shared on multiple systems, services, and apps. The array of locations is becoming overwhelming for some of the project team members. What is the best option for the project manager to manage the project knowledge in this situation?
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Stakeholders are not sure what to do about the multiple failures the project has been experiencing recently. Changes need to be made quickly otherwise the project may be terminated as consistently missing its objectives. What should the project manager do first?
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Not all team members are properly checking out resources used in the project. What is the best option for the project manager?
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