Grandsons inheriting

Q: If a person’s father passed away before his grandmother (i.e. Father’s mother) and the grandmother was inheriting from her grandmother will the grandsons inherit from the grandmothers estate while they are other brothers and sister of the father still living?

Grandchildren inheriting from their grandmother

Q: Ebrahim and Qassim are brothers. They were married to two sisters. Ebrahim had a son, Ismail who got married to his cousin, Khadijah (Qassim’s daughter). They had 8 children. Ismail, the father passed away a long time ago. Thereafter 3 of the children, Omar, Husain and Zahra passed away before their mother. Now their mother passed away.

My question is, can the children of Omar, Husain and Zahra inherit from their grandmother? If they are not intitled to the inheritance, can they get anything via any other way since they looked after her quite a bit.

Joining the army to become a mercenary

Q: I am 18 years old and will be completing my schooling this year. I am considering joining the army after I matriculate. Initially, after my training is complete, I will serve a certain amount of time in the army and may even be called upon to fight for the country (as is happening currently, where South Africa is fighting in certain other African countries).

My idea is that after some time, when I have sufficient training and experience, I will leave the army and become a mercenary (a soldier for hire). There is a great demand for mercenaries, especially in dangerous countries such as Iraq and other war-ridden countries like the African countries suffering from war lords, etc, and this profession is extremely lucrative.

Is this profession permissible in Islam?