question #1 Sahih Muslim 853, Book 7, Hadith 25 : What is the significance of the specific time on Friday mentioned in the narration for making supplications?

‘Abdullah b. Umar said to me: Did you hear anything from your father narrating something from the messenger of Allah (ﷺ) about the time on Friday? I said: Yes, I heard him say from the Messenger of Allah (ﷺ) (these words):” It is between the time when the Imam sits down and the end of the prayer.”