What Agile development approach is being used when the whole team works towards solving a complex problem?

The steps involved in value stream analysis include:

A servant leader is leading a high-visibility project to deliver a new product. The servant leader has been able to build a cross-functional team and create a team space where the team is collocated. The servant leader started receiving frequent visits from a company director, who continually asks a specific team member questions about project progress. The conversations are distracting the team from their goal. What should the servant leader do?

Agile project development processes typically:

Your team is running three-week Sprints. How much time should you schedule for Sprint Review sessions?