New PMP Question & Answers with explanation

According to the PMBOK® Guide, this output of the Manage Stakeholder Engagement process is used to promote communication with stakeholders.
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There are 10 stakeholders within your project. As the project manager, you must therefore manage 45 communication channels. Two additional stakeholders have been added. How many more channels of communication must you manage?
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Who developed the model that defines the stages of a team’s development?
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All of the following are true regarding project phases except for which one?
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The project team recently participated in a working session to examine and document the effectiveness of risk responses in dealing with overall project risk. What is this working session, or meeting, called?
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