Action_quiz :Able to takeoff and land manually but gradebot failed to takeoff and landing

Please take heed to the message from the bot, and also in the notebook:

  • When you send the takeoff command, it must takeoff the drone and leave it in the takeoff state (it must not land it).
  • When you send the land command, it must just land the drone and do nothing else (it should not takeoff the drone and then land it).