2. What is the period of Iddat girl has to observe, particularly when she has not stayed with her husband for more than year & now the boy has given irrevocable Talaq?
بسم الله الرحمن الرحيم
When he pronounced talaq thrice and signed the talaqnama, then three irrevocable talaqs took place. The iddah of wife shall come to an end after passage of three menstruation periods and it is wajib (necessary) for her to observe iddah though she stayed away from husband for more than one year.
Allah knows Best!
Darul Uloom Deoband