How is an inheritance divided among a father, a pregnant wife, a son, two full brothers, and four full sisters, taking into consideration the deceased's debts?

Debts owed by the deceased must be settled from his estate before its distribution among the heirs. The father receives 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 remainder is divided between the son and the fetus, with nothing for the full brothers and sisters, as they are excluded by the son and the father. It is preferable to delay the division of the inheritance until the fetus is born and its condition is known. If the heirs insist on immediate distribution, a share equal to that of two males is set aside for the fetus. The estate is then divided into 72 shares: the wife receives 9 shares, the father 12 shares, the son 17 shares, and 34 shares are withheld for the fetus. The withheld amount is returned to the son if the fetus miscarries or is stillborn.