New PMP Question & Answers with explanation

Project performance measurements assess the magnitude of variation from the original cost baseline. Once the degree of cost variation is known, what step is performed next?
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A Work Breakdown Structure is a hierarchical illustration of all the work to be done in a project. A WBS component does not represent:
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You are managing a project that requires an environmental permit to do work. The approval is in the final stages when a confidential, reliable report is brought to your notice. The report indicates there is a high risk of an environmental hazard due to the project. Your manager tells you it is better to keep quiet at this stage since losses from terminating the project might be very high. You must:
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Visiting a construction site to ensure the completed work is the same work specified in the requirements is:
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Collect Requirements, Develop Schedule, and Perform Qualitative Risk Analysis are all part of what process group?
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