Final answer:
Based on the given information, it is unclear who Agatha's 5th floor roommates are and whether Mrs. Archer's behavior is related to the question.
Step-by-step explanation:
Based on the provided information, it is unclear who Agatha's 5th floor roommates are.
Hattie mentions that Mr. Edgeworth and Mrs. Archer were involved in some sort of incident or disagreement, but it is not specified whether they are Agatha's roommates. Additionally, Hattie mentions that she cannot access Mrs. Archer's room, and that Mrs. Archer has locked herself in. However, it is not clear if Mrs. Archer is sick or if there is another reason for her seclusion.