alif

Q:

1.Does it break namaaz if in Semi Allahu limen hemideh one pronounce Alif instead of Ain in Semia?

2.Does it break namaz if one adjusts this mistakes already being up from ruku, meaning in the position standing straight when you say Rabbana lakal hamd?

3.Is sajda-sawh required for that?

4. If one did this mistake in witr namaz and then adjusted it at the position of Rabbana lakal hemd, then decided to make sajda-sawh, but in last tashahud he recited also Allahuma Sali and Allahuma barik, is his witr valid in shaa Allah?

5. I may not understand it from question 4, so please kindly answer separate – is it allowed to read all duas in last tashahud if one is going to perform sajda-sawh?