New PMP Question & Answers with explanation

Julie is a product manager responsible for a line of smart water bottles that connect to a mobile app to capture data and provide suggestions regarding your drinking habits. Julie meets with the Scrum team to talk through a major issue that threatens the latest release. Together, the team decides to focus collectively on the issue at hand until it is resolved. What is this an example of?
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Midway through the delivery of development services, a customer requested that new requirements be incorporated. When asked to submit a change request to modify the terms of the contract, the customer refused and insisted that the changes be implemented at no cost. After multiple discussions, neither party changed their stance on the situation. What technique will the project manager likely use to address this situation?
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A risk manager convened with the project manager to discuss the progress of the project. The risk manager shared concerns about feedback received regarding the low likelihood that the team would achieve their go-live date successfully. What activity is the project manager likely to perform next?
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These processes are responsible for distributing information about the project to the stakeholders and satisfying the needs of the stakeholders by managing communications with them, respectively.
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Match the term with its definition.
Matching
Term Definition
Story points
A unit-less measure used in relative user story estimation techniques
Burndown chart
A visual representation of the work completed toward the release of a product
Burnup charts
The sum of story point sizes for features actually completed during the iteration
Velocity
A visual representation of the work remaining versus the time left in a timebox