Salaah

Questions related to a masbooq

Q: Kindly answer below questions related to salaah: 

1. If a muqtadi misses some rakaat, at what point should he/she leave the jamaat and stand to continue the missed rakaat? Should he/she do it after the imam completes the 1st salaam or after the second salaam? 

2. For a muqtadi who has to missed a rakaat in jamaat salaah, should he remain quiet after the last tashahud behind the imaam and wait silently for the imaam's salaam to continue the missed rakaat, or can he/she recite durood and prayers after the last tashahud? 

3. If a person misses the 4 sunnah prayer prior to Zuhr or Jumah Salaah and joins the farz prayer in jamaat, does he/she needs to offer the missed sunnah prayer afterwards or not? If yes, then what's the correct sequence of offering the missed sunnahs? Should those be offered immediately after the farz jamaat salaah or after the 2 or 4 sunnah prayers that we usually pray after Jumah or Zuhr farz salaah? 

4. If a person makes sajdah while a couple of hair strands cover half the width of his forehead, would the sajdah be valid?

Walking in front of person who is performing salaah

Q: If a person is praying salah and you wish to go past them, is any of the following ways permissible? 

(a) You walk in front of them, stop for a while (say, 10 seconds) and then continue past them. 

(b) You walk in front of them, sit down, then stand up and then continue past them. 

(c) You walk in front of them, perform 2 rakat of nafl salah and when finished, continue past them.