New PMP Question & Answers with explanation

Ken is a product owner for a new product and is integrating smart technology into refrigerators. The latest project aimed to incorporate new features into the product. These features involved the use of facial technology to recognize members of the household as they walked by, displaying tailored recommendations on a panel within the refrigerator, such as favorite recipes or encouraging comments. Recently, Ken received the news that a competitor beat his company to market, and a window was missed. The project was cancelled. The competitor had recently showcased its technology in a key annual appliance conference, but Ken was not able to attend. What did Ken fail to do?
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Legitimate, expert, referent, and punishment are all types of what?
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The project manager facilitates the implementation of approved changes by following the documented change control process. Which of the following is a valid tool or technique to assist the project manager in performing this activity?
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A product manager meets with the team to apprise them of changes to how the upcoming project will be managed. She notes that the focus will now shift to producing deliverables through iterations and that iterative scheduling with a backlog will be used to account for the uncertainty in requirements. What is the value of this approach?
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Albert recently joined a rapidly growing technology startup company as a project manager. The approach to managing projects is different from the compliance-driven projects he is accustomed to managing in the past. He inherits a project that contains a great deal of uncertainty, with minimal requirements identified to date. To remedy this, he gathers the team and informs them that they will focus on nailing down the requirements before execution of work can continue. He is met with a high degree of resistance. What is the likely reason for this pushback from the team?
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