Salaah

Boundaries of an area to calculate safr distance

Q: I have a few questions about safr. 

1. What's the boundaries of Durban? Like a person leaving Overport, when will he start counting? And when returning if he stops in Pinetown, will he read qasr? And what about if he stops in Sherwood? 

2. In each direction where will he read qasr? So if he is going north up the coast where will he be able to read qasr? Going south on the n2? And going north on the N3? 

Basically what's the boundaries of Durban.

Performing qadha salaah in the masjid

Q: I have heard that one should pray Qadha prayer in solitude so that it should not be revealed to anyone that one is praying Qadha prayer. Is this true? 

If so, then there is a problem that in a house where one does not get solitude and it is not possible in the mosque, then what should one do in such a case? 

Then can one pray Qadha prayer in front of the family members or in front of everyone in the mosque.

Folding one's hands in the last rakaat of the sunnats of fajr while sitting and performing salaah

Q: If sitting down and performing sunnat of Fajr, after the last sajdah of the salah, one puts their hands up again for Surah Fatiha, but remembers before reciting anything, and then goes to continue tashahudd, should a qadha be recited for this salah? And should one have made sajdah sahw in such a case .