Fawwaz
Welcome to Pprune! You will find lots of people here willing to help you but they do expect you to do some research yourself.
As a Moderator I would expect you to read the 'stickies' at the top of the page and spend some time exploring the forum before posting questions that have been asked - and answered - many time before.
Could I ask you to do a bit more research and then let me know by private message and I will re-open the thread.
HWB