How is the inheritance of a man who left behind a mother, a wife, two full sisters, and three paternal cousins to be distributed?

The mother of the deceased receives one-sixth due to the presence of siblings. His wife receives one-quarter due to the absence of children. The two full sisters receive two-thirds. The cousins receive nothing as nothing remains for them. The inheritance is divided into 13 shares: two shares for the mother, three for the wife, and four for each sister. Inheritance cases must be submitted to the Sharia courts for investigation and to ensure that there are no other heirs, wills, or debts that take precedence over the rights of the heirs.