Final answer:
Fiona's team is in the norming phase of team development, where they have resolved initial conflicts and are now working cohesively towards their project goals.
Step-by-step explanation:
Fiona and her team are in the norming phase of team development. After experiencing multiple conflicts which is characteristic of the storming phase, they have now established a set of guidelines and are working cohesively towards their project goals. This transition is typical for teams that have moved past their initial conflicts and are beginning to settle into their roles and understand how to work together effectively, thereby setting the stage for the next phase, performing, where peak efficiency is achieved.