Jamaat Salaah and Imaamat

Q: If you join the jamaat in the last rakaat while the imaam is in tashahud, is your salaat valid or is it preferable to read alone?

Q: If I join Zuhr Salaah behind the Imaam after 3 rakaats, what is the correct procedure to join and complete the Salaah? What should I recite after standing up after the Imaam has made salaam? Surah Fatiha only ? Surah Fatiha and a Surah?

Q: Is it permissible for a mother and son to perform Salaah together in Jamaat? If so, where should the mother stand and is it necessary for the mother to give the iqaamah?

Q: Should the Imaam turn towards his right or left facing the muqtadis for making duaa only for Fajr and Asr Salaah?

Q: How should na-baaligh children be arranged in the suffs of the Masjid during Salaah?

Q: My mother does not want me to go to the Masjid for Maghrib and Esha Salaah. Though we only live 15-20 minutes from the nearest Masjid, our house is in a somewhat isolated area. So my mother fears me being hijacked or something similar. Hijackings etc. are common at these times and in our area, so the fear of my mother is valid. However, I do not feel it is so dire. But I could be wrong. Though I also want to perform all my Salaah in the Masjid Insha-Allah. Please advise if I have to follow this command of my mother and thus perform Maghrib and Isha Salaah at home?

Q: If the time for Fajr salaah in the masjid /musallah is up, and there is only the muazzin and imam present, but someone arrives just then but still needs to make wudhu and read sunnats. Should the muazzin stand behind the imam because they know there is another musallee that will join the salaah later, or should he stand on the right of the imam and when the musallee comes to join then move back to the saff?

Q: When leading the salaah, what should one do when his wudhu breaks? Must the salaah be broken, or is there a way for the congregation to continue?

Q:

1. If I miss the first rakaat of jammat after the Imam makes salaam, when I stand to complete the salaah do I read Surah Fatiha or first the thanaa then Surah Fatiha?

2. If I join the Imaam few minutes after he says takbeer, do I still read my thanaa or just lift my hands an keep quite?

Q: I have a question that if the imam is making salaam and I have just started the dua which is read after the durud shareef (Alla humma inni zalamtu), so should I continue reading the dua or should I make Salaam with the Imaam?