In which process might a project manager use risk reassessment as a tool and technique?

A new project stakeholder is identified who has interest in, but little authority or influence on, the project.
How should the project manager handle this stakeholder?

Configuration identification, configuration status accounting, and configuration verification and audit are all activities in which process?

A project's initial budget is USS200.000, but its actual cost (AC) to date is US$160,000. During an evaluation of the project's progress, the project manager determines that the cost performance index (CPI) is 0 8, which exceeds the budget baseline.
If current performance is maintained, what is the estimate to complete (ETC)?

During the project initiation phase, The project manager is identifying key deliverables based on the project's business requirements. The project manager believes that the timeline is unrealistic due to the high number of key deliverables.
What tool or technique should the project manager use to prioritize the key deliverables?