Performing salaah with animate pictures on one's clothes

Q:

1. If one prayed salaah while wearing clothes with a human picture which one missed to see and saw only after looking at them carefully, would those salaahss be valid? Does one need to repeat those salaahs?

2. What about praying salaah in clothes which have clear human/animal pictures?

3. If one prays next to or in front or behind someone wearing such clothes or wearing a work ID with visible picture of the person (around 2 inches in lenth and 2 inches in width) would the salaah be valid due to being in close proximity of a picture?

Cursing one's children

Q: Can you please give a detail masala about this hadith:

"Jabir (radhiyallahu anhu) reported: The Messenger of Allah (sallallahu alaihi wasallam) said, “Do not invoke curses on yourself or on your children or on your possessions lest you should happen to do it at a moment when the supplications are accepted, and your prayer might be granted.” [Muslim]

عَنْ أَبِي أُسَيْدٍ، مَالِكِ بْنِ رَبِيعَةَ السَّاعِدِيِّ قَالَ بَيْنَا نَحْنُ عِنْدَ رَسُولِ اللَّهِ صلى الله عليه وسلم إِذَا جَاءَهُ رَجُلٌ مِنْ بَنِي سَلِمَةَ فَقَالَ يَا رَسُولَ اللَّهِ هَلْ بَقِيَ مِنْ بِرِّ أَبَوَىَّ شَىْءٌ أَبَرُّهُمَا بِهِ بَعْدَ مَوْتِهِمَا قَالَ ‏"‏ نَعَمِ الصَّلاَةُ عَلَيْهِمَا وَالاِسْتِغْفَارُ لَهُمَا وَإِنْفَاذُ عَهْدِهِمَا مِنْ بَعْدِهِمَا وَصِلَةُ الرَّحِمِ الَّتِي لاَ تُوصَلُ إِلاَّ بِهِمَا وَإِكْرَامُ صَدِيقِهِمَا ‏"‏ (رواه أبو داود)"

Offering free education on condition that the student gives back a fixed percentage after he begins earning

Q: I want to start a school where I also want to educate poor students who cannot afford education. They will be given admission on the basis of a contract saying that in future when they start earning they will give 10% of their earning to me and in the case where they don't earn, they don't have to give anything. Is this permissible?

Suspended talaaq

Q: I had a fight with my wife and in anger, I told her that if you will do this work again you will be divorced on me.

My question is that if she does that work, will the divorce take place?