Times for Qadha Salaah

Q: I want to perform my qadha prayers. I will perform my qaza namaz after every obligatory prayers but I am worried about fajar and asar prayers. Please describe is it okay to offer fajar qaza namaz after fajar obligatory prayer and is it allowed to offer qaza namaz during asar and magrib prayer?

Q: Here the time of Fajr in Germany Offenbach is 6:00am, today I missed it and prayed at 08:30 as qada. Is this OK? I mean allowed?

Q: It is permissible to offer Qadha salaah after 'Fajar' and 'Asar' prayer?

Q: I understand that one can pray only qadha prayers after fajr and asr, but no nawafil salah. In the case of praying qadha prayers after asr, what time should they stop praying? How many minutes before sunset as this time is haraam to pray?

Q: Can I read 2 rakaats Tuhajjud and the rest my Qaza umree? I find that I am least disturbed at that time (tuhajjud).

Q: If you started praying fajr at 5.00am but sunrise was 5.01am and you finished praying at 5.02am. Is that classed as qadha late prayer?

Q: Should Qaza Salaah be performed immediately after the Fardh Salaah, or once all the Sunnah, Nafl and Wajib Salaah have been completed as well? Such a person has more than six outstanding Salaah.

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:

1. Can Qadha salaah (esp. Qadha Umri) be performed after the fardh of fajr and asr? If so then what salaah are not permitted at that time?
2. On safar, a person does not perform a salaah e.g. asr. On returning home from the journey, does one perform qasr (i.e. 2 rakaats qadah) or 4 rakaats of qadah?
3. Likewise, if a person omits a salaah e.g. asr in his hometown, whilst on safar does the person perform 4 rakaats of qadah or 2  rakaats of qadah for the salaah missed whilst still at home?

Q: I have missed out many farz prayers in the past and would like to make up for them. Please let me know at which times is it not permissible to pray qaza namaz?