New PMP Question & Answers with explanation

You have received a proposal for an RFP that was sent to vendors. One of the vendors has proposed doing the project for $12,500. The cost for the project is $10,000, and their profit will be $2,500. Which type of contract is most suitable if the type of work is predictable and the requirements are well-defined and not likely to change?
Select one
Which of the following is not a tool or technique of the Control Procurements process?
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Which of these is not an input to the Control Procurements process?
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Which of the following roles in a project is most likely to be involved in negotiations on procurements during the Conduct Procurements phase?
Select one
During the Conduct Procurements process, the procuring organization found that there were significant differences in pricing by different sellers. What is the best course of action in such a scenario?
Select one