Conditions for the validity of Salaah

Q: A radio station broadcasts Surah Waaqiya immediately after the Magrib Azaan. Is it permissible to delay performing the Maghrib salaah by about seven minutes and listen to the recitation of the Surah first?

Q: What is the last time of asr? As in how many minutes before maghrib can asr be read?

Q: Sometimes when I wake up for fajr, I wake up a little late and the time of fajr is nearly on its end. So in that circumstance can I pray only fardh? Because if I pray Sunnah, then to complete my fardh I have to rush my prayer.

Q: Can we offer Salaah wearing a T-shirt with the British flag or any other country's flag printed on it?

Q: Is it permisble to perform salaah wearing skinny jeans/ leggings/ tight fitting clothes?

Q: As I live in a city and because of the buildings, I can't always see the sky openly. How can I determine that time when salah is forbidden? Is there any trustful program to use, do you know one? I hope it is the one that shows time as salah calendar as I don’t always have wifi on at home? And also, if I didn’t make my fard yet and the forbidden time started, can I still make my salah if I see that due to some reasons I will miss it - like toilet is busy, water is going to be off, etc? How sinful is it to make salah at this time? Also, if I start salah some minutes prior to this time and ended it when this time has started, do I have to repeat my salah?

Q: Is it okay to offer Asr Salaah in Shaafi'ee time rather than Hanafi time? (I am a hanafi)

Q: My hairs are long and silky. When I perform Salaah, my hat falls off in sadja. Is it necessary to wear a hat in namaz or can I put on another thing to cover my head?

Q: Is it true that Esha time sets in one hour after Maghrib Salaah and is it permissible to perform Esha one hour after Maghrib Salaah?

Q: Can we offer Salaah in half sleeve shirt?