few question on about pray conditons

[Rock]

few queston about about pray condtions


1) when i am praying if i make a small mistake ie. in surah Quraysh at the begining i recite surah ikas and then realise i ment to recite surah quraysh so i then recite surah quraysh.


is this allowed


2) during pray i often getting back flashes of what is happening in the world and often i end up drafting off to dream world then i realise that i am worshipping Allah S.W.T and i continue on praying { do i need to break my pray and start all over again }


3) during salaat one breaks wind can he continue on praying or does he need to stop and perform wudu again


4) at work i pray salaat Zuhur and Asar together as i perform travel pray but when doing wudu i use soak wet toliet paper to clean my back side if you know what i mean , and front is this allow or do i need to use just water which is very hard from time to time as English people don't cater for Muslim


please answer in very simple form and basic no big words and no long sentences


may allah rewards you brothers and sisters for replying back to me

Bismillah


Assalamo alykom


1-Yes this is allowed.


2-No,there is no need to break your pray and start all over again .But try to avoid this situation as possible as you can.


3-Yes,he need to stop and perform wudu again


4-I think using wet toliet paper or water is acceptable.But why you pray salaat Zuhur and Asar together as you perform travel pray ?


I hope I am correct and clear.