New PMP Question & Answers with explanation

Sandra is managing a complex ERP design and implementation project. The project team has recently been hired. It is an enterprise-wide project affecting many stakeholders. It is very important for each team member to properly understand and follow the project communication requirements in order to keep the stakeholders engaged and informed. Which of the following tools and techniques can Sandra use to ensure that team members properly understand the project’s communications requirements?
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Robert is managing a construction project. The project's client is responsible for the design, while Robert’s organization is responsible for the construction. There has been a 45-day delay on a couple of major structure designs. This delay can only be recovered through crashing and will cost $2 million in addition to the approved budget. Robert prepares a detailed report and emails it to the client. In this scenario, Robert’s email to the client is an example of:
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Along with the project communications management plan, work performance reports are vital inputs to the Manage Communications process. Where do these work performance reports come from?
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Nate is the project manager for a research and development project. According to the project communication management plan, Nate has to call in weekly project progress update meetings. The last few meetings were a disaster since more time was spent in arguments and less on decisions. Which of the following techniques does Nate need to quickly acquire?
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Lucy is managing a high-tech software development project. She has luckily acquired the organization’s best performing employees. However, the project team is not communicating effectively, causing delays. The project communications plan is in place, but it seems as if the employees are not following it. The communications plan lays out the communications requirements but does not explicitly assign responsibilities. What should Lucy do first? (Assume that all the following actions need to be taken at some stage.)
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