New PMP Question & Answers with explanation

A project manager working within an Agile PMO is using a new approved contractor to fast-track the implementation of cloud-based solutions for her project. As part of overseeing the procurement activities for the project, she conducts a structured review of the work performed by the contractor. Which tool and technique does this question describe?
Select one
Which of the following best describes a burndown chart?
Select one
Which interpersonal and team skills can a project manager use to manage the project team?
Select three
You are a project manager working for Mail House King. Your company processes orders for several mail-order catalog companies. Your project is to install new mail-sorting equipment and software. You’ve had some problems and experienced some variances during the project. You expect these variances to continue throughout the life of the project and expect they will be similar to the variances you’ve seen so far. You know the following information: PV = 900, BAC = 1400, EV = 925, AC = 925. Which of the following is the correct ETC given the circumstances?
Select one
Control charts measure the results of processes over time and depict common causes of variances. Common causes of variances are a result of all of the following except which one?
Select one