Answer:
No. 4
Madness prevents a person from exercising careful thought.
No. 5
“ It took me an hour to place my whole head within the opening so far that I could see him as he lay upon his bed. Ha! --would a madman have been so wise as this?”
Explanation:
Based on the excerpt of this story, the narrator seems to believe that "madness prevents a person from exercising careful thought".
The narrator kept showing that someone who is mad can't be meticulous and careful in carrying out the kind of action he carried out in killing the old man.
It's seen that the narrator stated how meticulous he was in even opening the door. This carefulness will be impossible for a madman to carry out. Therefore, he believes that madness will prevent one from being careful. Then he said: “ It took me an hour to place my whole head within the opening so far that I could see him as he lay upon his bed. Ha! --would a madman have been so wise as this?”
