Sajdah and Jalsah

Q: Is it permissible to recite duas that appear in the Quraan in Sujood? Such as

رَبَّنَا آتِنَا فِي الدُّنْيَا حَسَنَةً وَفِي الآخِرَةِ حَسَنَةً وَقِنَا عَذَابَ النَّارِ

Q: Is it permissible for the imaam to recite the sunnat duaas of qaumah and jalsah while performing fardh salaah?

Q: When we sit between the two prostations, is it mandatory to say rabbigh firlee or is it just recommened? Kindly tell me the Hanafi view regarding this and if possible please also tell me what the Maaliki, etc. say. I came to know that it is mandatory to say this and salaah is not valid without this.

Q: Can we recite any of Allah's names as a supplication in sujood?

Q: On Tuesday 25/7/17 a certain female gave a talk after the taaleem. (My cousin asked me this question) She mentioned that reading the relevant tasbeehaat during the different postures of salaah 3 x is actually for musaafir (travellers) and not for those not travelling. We should read upto 11 x tasbeehaat in each posture. We are not ulema so can the ulema please enlighten us...because as far as we know even the imams of the masaajid read 3 x. So have we been taught wrong all the years?

Q: In Salaah, when sitting in jalsa position, is it sunnah to sit on the left foot with the right foot raised and the toes of the right foot facing the qiblah? The question is when sitting on the left foot is it also a sunnah to have the toes of the left foot facing the Qiblah?

Q: In order to create more space in the Musjid for Musallees on the occasion of Jumuah, we ask all the Musallees to move forward one step. The problem is that those Musallees in the first saff who are in line with the Mimbar, when they step forward, they have insufficient space for sajdah and thus make make sajdah on the step of the mimbar.

1.Is the Salaah of these Musallees valid?

2.If the Salaah is valid, is it Makrooh for them to make Sajdah in this manner?

3.In these circumstances, is it permissible to leave a gap in the first saff in line with the mimbar?

Q: Can we make dua during our salah? Is it not allowed to supplicate our dua in sujood (sujood not in between Salaah)?

Q: I have a question that how can we make dua in sajdah? Should it be in the Salaah or directly in the sajdah or should it be in Salaah Al Maktoobah or voluntary Salaah?

Q: On page 194 beheshti zewar English, #4, it says, the spot on which sajdah will be made should not be more than half a metre higher than feet. However page 165 #7 mentions the same maslah but says one span is the distance. Is the correct distance one span or half a metre?