New PMP Question & Answers with explanation

Your project estimates have come in as follows: Most Likely is 100 days, Pessimistic is 250 days, Optimistic is 75 days. What is the expected value of this estimate?
Select one
Waterfall, Agile, and PRINCE2 are all examples of what?
Select one
Carina is a principal project manager of You’ve Got Dogs, a specialty company that creates custom dog apparel and toys. As part of her practice, she sits down with her sponsor to evaluate how the project is performing by comparing the performance measurement baseline against actual schedule and cost performance. What technique is Carina using?
Select one
You are the project manager for Lucky Stars Candies. You’ve identified the deliverables and requirements and documented them where?
Select one
Sally and Joe are two project managers working in the corporate offices of a popular fastfood franchise. They are both studying for their PMP® certification and are reviewing processes pertaining to the Project Procurement Management Knowledge Area. They disagree on which process is responsible for performing activities relating to closure of procurements. Sally insists it’s the Close Project or Phase process, while Joe argues that it is the Control Procurements process. Who is right?
Select one