Answer:
(Fatwa: 921/755/B=1433)
(1) It is proved from the holy Quran and Hadith that Jumuah salah is fardh. It is enough that you have intention of Jumuah in your heart. Your Jumuah salah shall be complete.
(2) If some part of the head and back is bowed down in ruku then it will suffice for ruku. Your ruku was valid.
(3) If some part of forehead touched the ground then sajdah was complete. Sajdah shall be complete and salah shall be valid.
(4) Yes, salah shall be valid.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
