Qadha Salaah

Q: When I was young and ignorant, I used to have bad habits. Two of these included masturbation as well as neglect of salaah. Nevertheless, Alhamdulillah, with the Hidayat of Allah I have mended my ways. My question is, I want to make up for the missed Salaah. Should I start making up from when I was 15, or from when I was 12 when I ejaculated? I am not sure when my ejaculations were clear and when it started becoming milky in appearance.

Q: Do I need to perform Sunnat-e-muakkadah of each Salaah for Qadha-e-umri?

Q: My question is that can my mother complete the fardh namazes,fasts etc of her mother who had passed away (dead) so that she will be safe on the judgment day? Or there is some other way in Islam by which we can fulfil the remaining fardh ibaadaat of relatives who are no more alive?

Q: Please could you explain the method of performing qadhaa salaah missed from the time of puberty, as well as clarify the following:

1. Besides sunrise, zawaal and sunset, are there any times during which one cannot perform qadhaa salaah?
2. Should qadhaa be performed before or after adhaa salaah?
3. Is there a limit to the number of qadhaa salaah that can be performed at a time?
4. Does qadhaa have to be performed in the sequence it was missed? If I have missed a salaah today, do I make up that salaah first, or do I continue making up my previous missed salaah?
5. Any other information that you think will assist me in this regard?

Q: If a person has qadha salaahs, can he leave out the Sunnat-e-Muaqqadah and read the qadha salaahs?

Q: While I am travelling, I have qadha of zuhr and asr namaz. So shall I read the namaz again after travelling as full namaaz or as kasar?

Q:

1. The prophet (Sallallahu Alayhi Wasallam) prohibited us from reading Salah after asr, so why are we allowed to do qadha namaz after asar and after fajr?
2.  If one misses witr at night can we do qadha in the morning. If yes why because time has finished for witr at Dawn?

Q: Is Qadha-e-Umri a fardh namaz or nafil?

Q: I have a lot qadha salaahs to make up. I am performing as many as possible after each five Salaahs. I perform qadha salaah instead of sunnat ghair muakkadah and nafils. I would like to know, is it ok to miss out performing sunnat muakkada as well so I can complete all my qadhas quicker by being able to pray more?

Q: If one has missed Fajr due oversleep, and one is going to make it up after sunrise or before praying Dhuhr, should he make the recitation loudly or silently if one is praying alone? And what if one performs it together with other people? Or with someone who wants to join him as a nafila for him?