Jamaat Salaah and Imaamat

Q: My question is that we read the Alhamdu shareef in our namaz. When we read namaz in jamaat then do we need to read the Alhamudu shareef or not? 

Q: I heard that it is makrooh to perform Salaah behind an Imam who shaves his beard or trims it less than one fist? Is this true? If so, is it better to pray alone if there is no Imam with a Shar'ee beard present? Or is it not sinful to pray behind such an Imam?

Q: Do I also have to repeat my Asar salah if I read it in shafi time with a shafi Imaam?

س: لو شك المأموم في الركعة الثانية أنه قرأ الفاتحة في الركعة الاولي ام لا,ماذا يفعل؟

Q: I joined salaah jamaat at 5:17. Jamaat starts 5:15 at the end I didnt know much rakaats I read but because I joined at that time I regarded it as 4 rakaats. Is salaah valid?

Q: If a person does not go to a Musjid, and performs Salaah at home with his wife behind him, would he be absolved of the Wajib of Jamaat Salaah?

Q: If one wants to pray a Fardh Salah in Jamaat, can one join a person who is praying a Sunnah Salah? What if one joins a person who is praying a Sunnah salah, but you mistakenly assumed that he is praying a Fardh?

Q: What would the masala be regarding salaah read in jamaat in the home where the Imam begins reading salaah with non mahram females as muqtadi's?

Q: When reading salaah behind an imam, what does one read in the standing position (does the person following read surah fatiha and a surah)?

Q: In the massajid in Makkah and Madinah, there are no sahen areas. The second jamaah is performed in the musjid area. Should we join such a jamaah if we have missed the first jamaah?