code: def query_streamer(self, index):
          
  
          if index >= len(self.graph.streamers):
              return None
  
          info = self.streamer_status[index]
          highest_ack = self.streamer_acks.get(index, 0)
  
          return [info.last_attempt_time, info.last_success_time, info.last_error, highest_ack, info.last_status, info.attempt_number, info.comm_status]
docs: Query the status of the streamer at the given index.