What is the share of the deceased's grandchildren (the children of his deceased son), and his daughter, and their living mother, from his estate, which includes a feddan and a house?

If a son dies and leaves a wife, four male children, a father, a mother, and a sister, then the wife inherits one-eighth, the father one-sixth, the mother one-sixth, and the remainder goes to the children. The sister inherits nothing. The inheritance is what the son owned during his lifetime in terms of wealth, and it does not include what the father owns in terms of possessions.