Salaah

Masnoon qiraat in witr

Q:

1. My question is what surahs are the best to be read in witr? (I am referring to a Hanafi Madhad) Which or what surah is the best to recite in the first rakah, second rakah and in the last rakah.

2. Also is it permissible to perform one rakah witr after praying isha? And also is it permissible to perform 1 rakah witr in the dawn?

Istikhaara

Q: When reading salaatul istikhara, can one ask if a certain thing will be a success if done? Is it a valid question to ask?