Discharging zakaat for previous years

Q: Until recently I thought I did not have to give zakat because I was under the assumption there was only one nisab, the nisab for gold, and I have never owned more than the nisab for gold. However now I am aware that there is a nisab for silver, and that this should be used when calculating zakat. Since I haven't paid zakat until now, I would like to start calculating my zakat for the previous years as well as for this year however I have some questions as I haven't calculated zakat before:

1) Do I estimate how much zakatable assets I have at the END of each zakat year and then pay 2.5% of that in zakat?

2) The nisab value constantly changes, for example at the moment the nisab for is around £294, but previous years it was different. So when determining if I own above the nisab in previous years and am therefore eligible for paying zakat, since I don't know what the nisab was in those years should I use the current nisab when calculating for previous years?

3) Since I did not know I had to pay zakat, I also have not taken part in qurbani (udhiya). How should I go about calculating how much I owe for this?

4) Can I pay my zakat through an islamic charitable organisation, such as MuslimAid, IslamicRelief, etc?

Forgive me for the long question, but I want to make sure i'm paying zakat correctly, especially as I had been ignorant of it for many years. May Allah subhanahu wa ta'ala make it easy for us to fulfil our religious obligations.

Observing purda form one aunt's husband

Q: I am a young women, ready to get married. I studied kitaabs for four years . My predicament is as follows: I have an aunty (mothers sister) who stays quiet a distance away from my home. However from small I used to go and stay with her during the holidays. Over the years we have created a strong bond between myself and her family. We are so close , I can consider her as my second mother . After all this said, my story is with her husband. He is about 37 years of age. I find that over the years of staying together we have become very casual in our interaction. We laugh and joke around freely, sometimes he even touches me and vice versa. Taking into consideration all the above factors, please advise me.

Wazifa for difficulties

Q: My husband is in Saudi and his kafil is not giving him holiday. We prayed a lot to Allah Ta'ala. Is there any dua by which my husband can get holiday and he can come back to India. Please give me a dua to get my husband back.

Wet dream

Q: I want to ask you if I have a dream in which I feel love for a guy or my fiance so this is a wet dream and I will have to do ghusl for this if I feel little wetness? Maybe this wetness is due to sweating or istinja.

Inheriting from a non-Muslim

Q: My question is about inheritance. This is the case: Christian Sitti (grandmother) which made her best to raise muslim kids passed away on November 2015. Her muslim husband passed away long time ago. 4 kids: 2 male + 2 women 1 of the women is a widow and has 5 kids: their economical situation is unstable (all of them) Their kids: 3 male 2 women, from them 1 boy still single and 1 girl still single. All Muslim. The grandmother passed away leaving behind her lots of wealth and properties. She used to always say that she would leave her wealth to 4 of her granddaughters which used to live with her (daughters of her male son) Now that she passed away. They decided to distribute her wealth in the islamic way: 2, 2, 1, 1 Although most of her wealth is invested in properties, in which any of her daughters are included. The situation now is the following. One of the brothers is in charge of the distribution of his mothers wealth, while the daughters say that their mom would always say that they would be the ones in charge. I forgot to mention that all of them are multi millionaires, expect the widow daughter which has 5 kids and no one of them has wealth. He decided to give from the wealth 1 property for the youngest not married daughter in the widow, and 1 property for the widow, out from all the wealth that their mother left behind, leaving almost the rest of the wealth for the 4 granddaughters that used to live with her( daughters of her son). What is from the Islamic point of view the right thing to do please? I am the wife of the oldest son of the widow daughter, which at the same moment is the grandmothers first grandson. We moved in to Palestine to give our family a good Islamic education, please I would like to know if it is permissible for my husband to tell his mother (the widow daughter since she was 36 yeards old) to tell her mother not to accept this way of dividing the inheritance because they are willing to give her something symbolic which does not protect her neither her offsprings while accepting to give her mothers wealth and properties to the 4 granddaughters which none of them are married yet. The widow daughter which is the mother of my husband is willing to be unfair between her kids just to avoid fighting with her wealthy brother. By the way in her condition of widow with 5 kids she didn't have economical support from her wealthy family.

Waqf

Q: The en-dowers of a waqf property in situated in South Africa are all deceased. Their original intention was that the rental proceeds from the waqf property should be given to a specific madrassa in India. The current trustees have no contact with the responsible individuals in India and as a result the funds are collecting in a bank account in South Africa. A local SA musjid trust has approached these trustees to purchase that waqf property for the purposes of establishing a much needed madarassa.

1)Can the trustees sell this property to the local musjid trust.

2)Can they grant the local musjid trust the use of the property at no charge.