How is the estate to be divided for one who passed away, leaving behind a wife, a mother, two daughters, and a brother, and who had a son who died in an accident before him?

If the son dies during his father's lifetime, he inherits nothing. The estate is divided as follows: the wife gets one-eighth due to the existence of a lineal descendant, the mother gets one-sixth, the two daughters get two-thirds, and the remainder goes to the brother. The estate is divided into 24 shares: the wife gets 3 shares, the mother gets 4 shares, the two daughters get 16 shares (8 for each), and the brother gets 1 share.