Answer
(Fatwa: 1788/272=TB/1429)
(1) Yes, you can deposit the amount, but you should take out the interest amount given by the bank and give it to the poor without an intention of reward.
(2) If it is not possible on seventh day then make it on 14th day, if it is also not possible then on 21st day. If not possible, then you can do it any day you like, but it is better to have it on seventh day of birth e.g. the baby was born on Wednesday then the aqiqah should be made on Tuesday.
(3) There is a book named: Ham Arabi Kaise Bolain. You can get the book.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband