Question: Upon receiving a Floor Revoke message from the floor control server arbitration logic, what actions does the MCPTT server's floor control interface towards the MCPTT client in the IWF (Interworking Function) perform?
Option 1: Only forwards the Floor Revoke message to the floor participant and ignores any additional fields.
Option 2: Forwards the Floor Revoke message to the floor participant, stores the Track Info field if present, and updates its state to 'U pending Floor Revoke'.
Option 3: Enters the 'U pending Floor Revoke' state without forwarding the Floor Revoke message or storing the Track Info field.
Option 4: Sends an acknowledgement to the floor control server arbitration logic without taking any further actions.
Explanation: This is the correct answer because, upon receiving a Floor Revoke message, the MCPTT server's floor control interface must perform three specific actions in sequence: forward the Floor Revoke message to the floor participant, store the Track Info field if present, and enter the 'U pending Floor Revoke' state, ensuring all aspects of the message are appropriately handled.