question #1 Sahih Muslim 962d, Book 11, Hadith 107 : What actions did the companions take when they observed the Prophet’s behavior during a funeral procession?

I heard from Mas’ud b. al-Hakam who narrated it on the authority of Hadrat ‘Ali that he said: We saw the Prophet (ﷺ) stood up for a (bier) and we also stood up; he sat down and we too sat down.