Explanation
The Prioritized Product Backlog contains a prioritized list of business and project requirements written in the form of Epic(s), which are high level User Stories. The Prioritized Product Backlog is based on three primary factors: value, risk or uncertainty, and dependencies. It is also referred to as the Risk Adjusted Product Backlog since it includes identified and assessed risks related to the project.

Explanation
The core dimensions of collaborative work are as follows:
1. Awareness - Individuals working together need to be aware of each other's work.
2. Articulation - Collaborating individuals must partition work into units, divide the units among team members, and then after the work is done, reintegrate it.
3. Appropriation - Adapting technology to one's own situation; the technology may be used in a manner completely different than expected by the designers.

Explanation
The prime responsibilities of a Scrum Master are:
Removes the obstacles/impediments that affect productivity.
Shields the people from external disturbance.
Responsible if the scrum process is correctly applied.
Facilitate daily stand-ups, other ceremonies, schedule meetings, demo and other meetings.
Help product owner in prioritizing the backlog and any feedback from the team.
Facilitation of Retrospective meetings
Workshops for planning, estimation, prioritization, issue resolution, performance improvements