In Agile, specifically Scrum, the project manager's role aligns to the three Scrum team member roles of:

Product owner: concerned with "what and when."

Development team member: concerned with "how" and "how much."

ScrumMaster: concerned with the "why" of Scrum, supporting the Scrum team, and reducing unnecessary demands.

Research these four roles $($project manager, product owner, development team member, ScrumMaster$)$ and provide a comparison including:

Description of the role.

Alignment to Scrum.

Accountability of scope, time, cost and quality.

Facilitation and conflict resolution.

Should a plan$-$driven project manager be assigned to an Agile project? Why? Or Why not?