question #1 Sahih Muslim 609, Book 5, Hadith 210 : What is the significance of performing a rak’ah before sunset or sunrise in relation to the prayer time?

The Messenger of Allah (ﷺ) said: He who finds a prostration before sunset or at dawn (prayer) before the rising (of the sun) he in fact finds that (prayer), and prostration implies a rak’ah.