Waajib & Sunnah I'tikaaf

Q: I need to know the period of I’tikaaf (the last 10 nights of Ramadhaan spent in the Masjid)

1) For how many days we can do I’tikaaf? I heard for 10 days only.

Q: I made intention for sunnah Itikaaf, but while coming to the musjid, I got stuck in traffic. Thus, I entered the musjid two to five minutes late. Is my Itikaaf valid? Is it compulsory upon me to make it up the next year?

Q: Can a person in i’tikaaf have a Friday bath with the intention that it is sunnah? Is it better for him not to have the Friday bath? 

Q: Is it permissible for one sitting in sunnah i’tikaaf to leave the musjid to break wind.

Q: Is it permissible for one sitting in sunnah i’tikaaf to do business transactions in the musjid?

Q: Is it permissible for a person sitting in sunnah i’tikaaf to phone his wife?

Q: Is it permissible for a person sitting in sunnah i’tikaaf to leave the musjid to smoke?

Q: What is the Shar’ee ruling if a hafiz (who is sitting in sunnah i’tikaaf) leaves the musjid to perform taraweeh?

Q: Is it permissible for one sitting in sunnah i’tikaaf to leave the musjid for a ghusal in order to cool himself?

Q: If one left the Musjid with the intention of relieving himself and thereafter made Ghusal, will the I’tikaaf break?