New PMP Question & Answers with explanation

During quantitative risk analysis, a project manager held a planning meeting with key stakeholders to share the results of the latest analysis conducted. What-if scenarios were performed on several important risks and then displayed using a tornado diagram. This is an example of:
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Ronald Pierce is a high-end furniture store chain. The company is in the process of developing a new renaissance style edition for release in six months. The project manager leading the development of the new edition is currently developing risk responses, alongside the risk management team. In response to one of the threats, insurance was purchased to cover any potential losses, should the risk emerge. What type of response did the team utilize?
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If earned value = 1,700, planned value = 2,000, and actual costs = 1,950, what is the CPI?
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A project manager meets with a key set of experts within her project team. They express concerns over recent cost estimates produced, insisting that they have not sufficiently considered alternatives. It is still early in the project life cycle. Which of the following is a valid tool or technique that can aid the project manager in addressing the team’s concerns?
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One of your subproject managers, a recent graduate with limited experience in managing projects, prepared a procurement SOW. When you were researching independent estimates, you discovered that your vendor’s proposals are way off of your expectations. You review the SOW and find that it was not detailed enough for the vendor to come up with an accurate estimate. Of the following options, which area of the PMI Code of Ethics and Professional Conduct does this question relate to, and which process does the independent estimates tool and technique belong to?
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