How is the inheritance of a deceased, unmarried brother divided, who has a mother and full siblings, and whose father is deceased?

If the father dies and leaves behind only a mother, two full brothers, and full sisters, then the mother receives one-sixth due to the presence of a group of siblings. The remainder goes to the brothers and sisters by way of ta’sib (residuary heirship), with the male receiving the share of two females. It is advisable to refer the matter to Sharia courts or consult scholars to verify all heirs, wills, debts, and other rights before dividing the inheritance.