80% of the value comes from 20% of the work. Which law is this referring to?

An agile leader notices that a team member is becoming very quiet and disengaged in meetings.
What should the agile leader do to identify team members' personalities and motivators?

Which of the following is NOT an Extreme Programming Practice?

The team is derailed by a demand from a senior manager unrelated to the project. How does the agile coach help the team?

Which Agile method promotes the practice of risk-based Spike or Spike solutions?