on/by my own

  1. I think I can do all the work on my own.
  2. I think I can do all the work on my own effort.
  3. He got distinction on his own efforts.
  4. He got distinction by his own efforts.
    Please correct the above and comment.
    Thanks.
  1. I think I can do all the work on my own.
    2. I think I can do all the work on my own effort.
    3. He got distinction on his own efforts.
  2. He got a distinction through his own efforts.