Making an announcement in the Musjid regarding the sighting of the moon

Q: Can announcing the sighting of the new moon in the masaajid be considered a bidah. For the month of Ramadhaan and for both Eids I would think that it is important. But for the other months of the year is just writing on the musjid board not sufficient. Please comment and if possible give reference to practices during the time of our Beloved Nabi (Sallallahu Alayhi Wasallam).

Making dua for a friend

Q: I have a very close friend of mine. Due to some personal reasons, I am feeling like as if someone has done some magic on her. I wanted to ask about some dua as told by Nabi (Sallallahu Alayhi Wasallam) or mentioned in Quran to get a solution for it. Furthermore, I wanted to know whether it is alright to recite this dua even if we doubt that somebody is under the influence of magic? I wanted to confirm this.

Dyeing the hair

Q: I had confusion in hair colouring. I am twenty years old and I have slight brown hairs which I want to dye and turn it into fully brown colour hairs. Please let me know if it is permissible?

Living with one's wife abroad

Q: I am working abroad and I would like to call my wife here. My father passed away and I have four younger brothers in the house with my mother and wife. All brothers are studying. My wife takes care of all. I can't stay here without my wife. I need her mentally and physically. In this case if I bring her here, will it cut off my mother's rights and will Allah be angry with me? What will be the Shar'ee hukm regarding this?