Question1: A person passed away and left a house for his heirs. After a while, one of the male heirs passed…

Question1: A person passed away and left a house for his heirs. After a while, one of the male heirs passed away, leaving behind a wife. Is the wife entitled to a share of her husband's entire share of the house (land and building or building only)? Question2: The state owns a piece of land and grants the usufruct (right to use and benefit from the land) to a person. This person has the right to sell the usufruct to another person. If the usufructuary (the person who holds the usufruct) dies and leaves behind a wife, does the wife inherit any part of the usufruct of that land? Question3: In the case of Question 2, after the death of the usufructuary, the government divides the usufruct of the land equally among the heirs of the deceased according to the civil law. What is the ruling of the Sharia (Islamic law)? Should this division be implemented, or should the division be based on the shares and portions of inheritance?