Dying the hair black

Q: I am a twenty years old. Since January I have a disease. Now I am recovering. My question is that this disease has caused my hair to turn white before age. I know that it is haraam to pluck white hair and also that one falls in Allah's eyes by doing such deeds. But I have also heard that young muslims can even dye their hair black if they wish. I want to ask that is it permissible to pluck such white hair that are growing before age and are a result of a temporary disease?

Are the deceased aware of the happenings of this world?

Q:

1. Can a dead Muslim feel the feelings of his close relatives after his death? i.e their sorrows, weeping, happiness and they are remembering him or not after him/her? The soul of a good Muslim can come in the world to know about his family? I heard that the soul come to the place where he/she died for forty days. And they come if there is halwa or some good thing cooked like chicken and if there is lentil like masur dal then they go away, I heard that it is common concept of deobandis and bralvis.

2. Do we feel or see the souls of our close relatives? What is the reality of dreams about dead ones?

3. Dead can not hear us? but most muftis say that they can hear due to prophet saw used to say salam to them.

Surah fatir وَمَا يَسْتَوِي الْأَحْيَاءُ وَلَا الْأَمْوَاتُ ۚ إِنَّ اللَّهَ يُسْمِعُ مَنْ يَشَاءُ ۖ وَمَا أَنْتَ بِمُسْمِعٍ مَنْ فِي الْقُبُورِ

surah naml إِنَّكَ لَا تُسْمِعُ الْمَوْتَىٰ وَلَا تُسْمِعُ الصُّمَّ الدُّعَاءَ إِذَا وَلَّوْا مُدْبِرِينَ

surah roam فَإِنَّكَ لَا تُسْمِعُ الْمَوْتَىٰ وَلَا تُسْمِعُ الصُّمَّ الدُّعَاءَ إِذَا وَلَّوْا مُدْبِرِينَ

Gadats

Q: Are 'gadats' which are commonly performed in (cape town , south africa) part of our Islamic religion and is it mentioned in the Quran. Is it a good thing? A Sunnah? Will one benefit from taking part in these 'gadats'? We also refer to these 'gadats' as 'thikrs'. Is gadats and thikr the same thing? What is the difference? What about the 3,7,40,100day (gadat) ceremonies for the deceased?

Sunnah dua to be recited in the morning and evening

Q: I want to query regarding a wazifa which I heard lately from an Aalim. However I cannot remember the words of the wazifa which the Aalim had told me. I can't remember whether her said أَعُوذُ باللهِ السَّمِيعِ العَلِيمِ مِنَ الشَّيطَانِ الرَّجِيم or أَعُوذُ باللهِ السَّمِيعِ الحَدِيمِ مِنَ الشَّيطَانِ الرَّجِيم. He said that after reciting this wazifa thrice, the last three verses of Surah Hashr should also be recited.