New PMP Question & Answers with explanation

During the procurement process, a contractual relationship is established between a buyer and a seller. During the contract lifecycle, what is the correct sequence in which the following terminology is applied to a seller: Vendor, selected source, and bidder?
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Many organizations consider contract administration to be an administrative function separate from the project organization. Who carries out the function of contract administration in such organizations?
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As part of the procurement process, the procuring organization elected to have an estimate of costs prepared by an outside professional estimator. The estimator came up with an estimate of $500,000. However, the cost estimates prepared by prospective sellers were in the range of $200,000. How can this be best interpreted?
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Which of the following is an output of the Conduct Procurements process?
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If you had an experience with a particularly well or poorly performing vendor, what is the correct way to document this experience for future projects?
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