Following chart lists stories for a release of an Agile project;

If the team completes Story A, Story B, and 50% of Story C for the first iteration, what is the team's velocity?

At the end of first iteration, the team finishes User Stories A, Band 50% of C. What is the team velocity?

An agile team provides feedback that user stories include insufficient details to understand the requirements.
What should the agile practitioner do?

A full cycle of design-code-verifyrelease practiced by extreme Programming (XP) teams is called:

An agile coach is assigned to help a project team that was recently co-located close to a very popular business Many team members visit this business during working hours which affects team performance.
What should the agile coach do to mitigate this issue?