How should product-based planning be used as part of PRINCE2 Agile?

Which statement about the 'initiating a project' process is CORRECT?

Which statement describes how the PRINCE2 'starting up a project' process can be applied in an agile environment?

Which TWO project board responsibilities are specifically assigned to the senior user?
1) Demonstrating the achievement of benefits.
2) Specifying the needs of those impacted by the outputs.
3) Balancing business, user and supplier demands.
4) Ensuring that the project delivers value for money.

Which statement about an epic is CORRECT?