salaah

Sunnat Salaah before zuhr

Q: I would like to ask concerning about the 4 raka'at sunnah before zuhr. I heard someone say that there should only be one salaam in the entire 4 raka'at. Then someone told me that there should be 2 salaams, now I'm confused. Which one is correct? or it depends on which madhhab I follow? Please elaborate.

Muqtadis reciting Surah Faatihah in salaah

Q: In chapter no 7 (Surah Al-Araf) verse number 204 it is stated that "When the Qur'an is read, listen to it with attention, and hold your peace: that ye may receive Mercy". So why do people when praying Fajr, Maghrib and Isha (fardh) behind the imam (first 2 rakahs), when the imam finishes reciting surah AL-Fatiha, many people recite surah fatiha, although the imam is reciting another surah. Please do clarify this.