Salaah

Hanafi performing Asr Salaah in Shaafi'ee time

Q: As the Asr prayer for the Ahnaaf starts after Mithle-Thaani, in Gulf countries it starts at Mithle-Awwal and the jamaat of Asr in the Masjid is made whilst the Dhuhr time of Ahnaaf is still going on and since in each and every part of the Gulf the asr jamaat is at earlier times, what should a person do? Should he join the jamaat or should he pray alone for Asr prayer? 

Musaafir performing salaah with jamaat in the masjid

Q: I have a few questions regarding a musafir.

1. If a musafir joins the jamaat in the masjid, does he have to perform the full salaah? For example does he have to read the full 10 rakaats of Zohr or just the 4 Fardh that was read in jamaat?

2. Is it better to read the salaah in jamaat in the musjid or on my own, if I don't know any other musaafirs to make jamaat with?

3. Is it better to read qasr salaah or the full salaah when traveling, if I am reading alone?

Difficulty in performing wudhu and salaah due to ill-health

Q: I have many health problems including back pain, incontinence, tiredness, mentally and physically weak, etc. I spend most of the time resting on the bed. Doing wudhu and praying 5 times is very difficult for me. I feel unwell most of the time, doing wudu, praying salah take very long time and I become tired and stressed out.

I don't know any Muslim doctor to ask this and no one else can help me do wudu. Because my illnesses like back pain, tiredness go worse by wudu and praying, can I do tayammum instead of wudu? And pray salah sitting? I tried doing tayammum and pray sitting but still I struggle.