Ta'ziyah (sharing condolences with the bereaved)

Q: My uncle passed away few months ago and I would like to know after burial what needs to be done. Some people have gathering at home for 3 days and some people have gathering for 13 days and some people have gathering for 40 days could you please tell me which group is correct. Also people have told us to have a special dua on 40 days then on 6 months of the death and the last one at 1 year after the death. Can you please tell us what is the correct thing to do?

Khula before khalwat

Q: My question is these if khula is taken before bidai and their is no physical contact between husband and wife, no out going, nothing, just a nikaah performed like an engagement. Girl is completely virgin. theie is no bidai at all. So does she have to be sit in iddat or not?

Inheritance

Q: I am preparing my will. My dad is alive. I have 2 daughters, 1 son and a wife. Due to past family issues, my dad has entrusted me to 100% of the family business. In my heart and conscience 2/3 belongs to my two brothers. My brothers are not of stability. Presently I take care of all their requirements. Please advise how I would fulfill my obligations of inheritance.