New PMP Question & Answers with explanation

A project manager is looking at a make-or-buy analysis as part of the Procurement Management process. What type of costs should the project manager consider for this analysis?
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A buyer and seller set the rates for junior engineers, senior engineers, architects, and other predefined roles. In what type of contract would this be applicable?
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A number of deliverables were submitted to the buyer as part of a project. Where would the project manager find documentation on the requirements for formal deliverable acceptance and on how nonconforming deliverables can be addressed?
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A buyer and seller are looking at getting into a long-term relationship spanning 10 years. Both parties would like to be protected from the unstable financial conditions of their country, which are beyond their control. What type of contract is appropriate for such a relationship?
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A seller entered into a contract with a buyer. At the end of the project, the seller was reimbursed for the cost of the project but received a low fee based on certain subjective criteria that were specified in the contract. What type of contract is this likely to be?
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