Need urgent help for tomorrow's test!

Hello.. i am a new user and need help for the test we are going to do tomorrow. The question's i am stuck with (need more help with) are:
1. How does Qur'an define "lack of faith," "darkness"
2. Who protected the Prophet after the death of his mother
3. What is Hilful Fudul
4. What signs were in the Bible that hinted the last messenger
5. Who was Salman-i Farisi? Where wass he from? how did he fine the truth?
6. Why didn't Abu Jahl accept the message of the Prophet?

Thank you very much :)