How is the estate of a man who died leaving a wife, two full sisters, one half-brother (from the father's side), and two sons of a deceased full brother to be distributed?

If a person dies leaving a wife, two full sisters, a paternal half-brother, and two sons of a full brother, and no other heirs, then the wife receives one-quarter, the two full sisters receive two-thirds, and the remainder goes to the paternal half-brother. The two sons of the full brother receive nothing, as they are blocked by the paternal half-brother. The estate is divided into twelve shares: the wife receives three shares, the two sisters receive eight shares (four for each sister), and the paternal half-brother receives one share. It is important to note the seriousness of inheritance matters and the necessity of referring them to Sharia courts for investigation and to ensure there are no other heirs, wills, or debts.