I’m fairly sure someone had the same misunderstanding only yesterday. I hope this isn’t homework!
I’m actually surprised that there is an action ID on the first answer, as this is a normal event, whereas action IDs are normally only generated before the success/failure response and only by explicit code in the action hander. I guess there is special code for this.
I certainly wouldn’t expect the B side answer to be sufficiently related to the originate to get special treatment. By that time other AMI actions could have influenced the call.