How is inheritance divided among the heirs: (son), (full brother), (mother), (wife), (full sister)?

If the deceased leaves behind only a mother, a wife, a son, a brother, and a sister, then the mother receives one-sixth, the wife receives one-eighth, and the remainder goes to the son by virtue of ta'sib (agnatic inheritance). The brother and sister receive nothing, as they do not inherit alongside a son. The estate is divided into twenty-four shares: the mother receives four shares, the wife receives three shares, and the remainder goes to the son.