A new agile project manager accepts an assignment to manage a well-established team. Many team members have worked together on this product for several years. During a meeting, the project manager notices that team members offer little vocal interaction, yet all required tasks are completed on time.
What type of behavior does this describe?

Which type of story would be used when an estimate is not available due to lack of knowledge of the technology required to implement the story?

A scrum team has eight developers, but only two are database engineers. During the last few retrospectives, the team identified that most sprint stories are dependent upon database engineers. This has created a bottleneck in completing stories.
What should be proposed to the team?

During the daily standup meeting, a team member states that an issue has been encountered. This leads to the team members getting into a problem-solving discussion. How should the ScrumMaster respond?

Two similar stories, A and B, are estimated at 3 story points. Story C, is estimated at 8 points.
After an iteration in which A and C were completed, it is found that story A took much longer than story C.
What should the agile practitioner do?