What is the share of each heir from the inheritance, given the presence of a father, a son, a mother, and a wife?

The inheritance is divided as follows: the father and mother each receive one-sixth due to the presence of a lineal descendant, and the wife receives one-eighth due to the presence of a lineal descendant. The remaining portion goes to the son by way of ta'sib (residuary heirship). Thus, the estate is divided into twenty-four shares: four shares for the father, four shares for the mother, three shares for the wife, and the remaining thirteen shares for the son. It is emphasized that matters of inheritance are critical and require review by Sharia courts to verify all rights, bequests, and debts before distribution.