pants

Q: I have a number of confusions about Salaah and will be grateful for clarification.

1. If one recites Surah Fatiha in part but fears a mistake or miss pronunciation and recites it again from the start, will sajdah-e-sahw become waajib? If yes, what portion of Fatiha repetition will invoke it?

2. Sitting in tashahud position, if I am tired and my hands roll beyond the thighs with fingers running over my knees, how bad is this?

3. In summer, I have a habit of folding up my shirt sleeves well above the wrists and trousers well above the ankles and perform my Salah in the same state. I am told that this is forbidden, how bad is it if one folds one's garments up in Salah? If my lower garment reaches my ankles, (men's ankles should be exposed) is tucking trousers up at waste or folding at the bottom, still forbidden? I live in a cold country, We don't get garments made these days, we buy clothes ready made, whatever we get and sometime these are a little oversize, out of difficulty and not arrogance. How can one reconcile?

Q:Can Muslim men tuck their shirts into the pants and wear a belt? Is it permissible in Islam?

Q:

1. Can Muslim men wear pants and shirts if the pants is not so tight fitting?

2. Can Muslim men wear jeans pants if it not very tight fitting?

3. Can men leave their pants below the ankles when going to office? Provided he doesn't have pride in doing so. And when he goes for mosque for namaz he folds his pants above the ankles. Just when going for job he doesn't fold it because it look awkward in the office when the pants is folded from below.

4. Is it permissible to wear safari suit for Muslim men in some formal occasions in the work place as well as in the wedding?

Q: Will the salaah performed behind an Imaam who wears his trousers below his ankles be valid?

Q: My husband has arthritis in his ankles so he needs to keep them warm. In winter he finds just rolling up his socks to cover them is not enough and they cause him pain. Would it be permissible for him to keep his trousers over his ankles to keep them warmer?