New PMP Question & Answers with explanation

The project manager is trying to get sign off for a series of marketing materials. The work is rejected by the stakeholders responsible for sign off because of incorrect use of marketing standards. What should the project manager do before sending materials to the stakeholders again?
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A new project manager is brought on the project. She wants to understand the process by which this particular project formally accepts deliverables. Which of the following will she have to reference?
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A project manager is meeting with Sally, the program manager, to review the decomposed deliverables for a new product. Sally reviews the work breakdown structure and requests it to be arranged in the order the work should be performed. Is Sally correct saying that the work breakdown structure should be ordered according to how the work will be performed?
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You are part of the project team designing a new type of subway car. You have completed the last work package for the braking system; however, you are not sure what the acceptance criteria are for this particular work package. Where can you find that information?
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You are managing the development of a new smartphone in an extremely competitive market. You are planning the must-have features of the smartphone in detail so that work can begin and the product can be released to the market as early as possible. The future features are unknown at the moment and will depend on what the competitors release. You will plan these features in greater detail later on. As you and your team create the work breakdown structure (WBS), what will you use to indicate the future features?
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