PMP Practice: Deduce project resource requirements

Bodhi Tanaka-Fernandez is leading an agile project at Glacier Peak Energy to develop a mobile app for tracking personal carbon footprints. The project is in early planning, and Bodhi needs to determine what skills and roles will be required for the cross-functional team. The organization has limited experience with agile delivery, and executives are asking for detailed resource plans upfront. The product owner has drafted initial user stories but acknowledges they will evolve significantly as customer feedback is gathered. Which approach would be MOST effective for Bodhi to deduce project resource requirements?