Method of Salaah

Q: Can we say aameen in sajdah after making dua? Also, when we make dua after the durood in salaah, can we say aameen?

Q: I have heard that in Surah Fatiha اَلۡحَمۡدُ has to be pronounced from the throat otherwise the meaning will be changed. I pronounced all my previous prayers without pronouncing it from my throat, are all my previous prayers invalid and do I have to repeat them?

Q: Whenever I do the two sajdahs and sitting in between, I do it quickly. However, I make sure to properly sit on my legs before doing the second sajdah. as long as I do this, is it ok if this process is done speedily?

Q: My question is regarding the order of recition of Surah's in namaz. We are students and I was the imaam for fajr. In first rakat, after Surah Faatihah, I recited Surah Nasr and in the second rakat, after Surah Faatihah I recited the first 3 verses of Surah Mulk. Was the namaz totally wrong and needed to be offered again?

Q: What is the sunnah qiraat for the different salaah, and is it sunnah to recite it in all the salaah (i.e. sunnah, witr and fardh) or only the fardh salaah?

Q:

1. During the fardh salaah of Zohr, Asr, Maghrib and Isha, can the imam omit Surah Fatiha in the 3rd/4th rakat (when there is time constraints)? Stand for 3 subhanallahs before going in ruku.

2. Also, when one is performing Salah individually can one omit for the same reasons?

3. What is the status of Surah Fatiha in 3rd and 4th rakaat? i.e. Fardh, wajib, mustahab etc.

4. Is there any hadeeth to support?

Q: I was sad for a moment during salah and I think my throat strained and my recitation jerked slightly. Is my salah fine?

Q:

1. When we read durood in namaz or in general we say Muhammad, so do we have to say sallallahu alaihi wasallam 4 times?

2. What are the rewards of just saying sallallahu alaihi wasallam, like how durood has its rewards? 

Q: An Imaam performed Fajr Salaah, he recited Surah غاشية. In this Surah he read وجوه يومئذ غاشية instead of خاشعة. Will the Salaah have to be repeated?

The Imaam occasionally gets confused between laam and raa, should he be making Imamat?

Q: Can I say aamen in sujood after making dua and after Durood in namaz?