Ramadhaan & Fasting

Q: If one made i’tikaaf compulsory upon himself, will it be compulsory to carry it out?

Q: Can one sit for sunnah i’tikaaf out of the month of Ramadhaan?

Q: If one's fast broke during the last ten days of Ramadhaan, will his sunnah itikaaf also break? If his itikaaf breaks, will he have to make qadha of the entire ten days' itikaaf or only for the day his itikaaf broke? 

Q: When sitting for sunnah i’tikaaf, is it necessary for one to be fasting?

Q: When sitting for nafl i’tikaaf, is it necessary for one to be fasting?

Q: Is it permissible for a man sitting for Sunnah i'tikaaf to use a cell phone to check on his family at home and to see to their needs?

Q: An old lady in my locality gives one plate of food everyday as fidyah. She suffers from sugar and diabetes. She asked whether for her to give this one plate is compulsory or nafl because she is old and not rich so it is taxing on her.

Q: What is the maslah with regard to keeping a nafil fast on a Friday? Also is the ruling different if a qadha fast is kept on a Friday?

Q: The three fast for breaking a qasam have to be fasted together or with intervals?

Q: A relative of mine came from overseas for holiday. The wife carried hot water in a flask for the child's milk. At the airport in England, they asked her to drink the water (to see whether it is really water on something else). She explained that she is fasting. They said either she drinks little of the water or they will have to throw the water away. She therefore drank some of the water. Will she have to keep only qadhaa, or kaffarah as well?