Who inherits the deceased "Zahra Khader," who left behind a husband, knowing that she had no children, based on the family tree illustrated in the question?

If the deceased (Zahra) has no heirs other than those mentioned, then her husband receives one-half due to the absence of a lineal descendant. Her sister receives the remaining one-half, provided that neither parent is alive. However, if both parents are alive, the remainder is divided between them, with the male receiving the share of two females, and the sister does not inherit alongside the father. If the mother is alive without the father, along with the husband and sister, then the husband receives one-half, the mother one-third, and the sister one-half, and the estate will be subject to awl (proportionate reduction). The matter must be referred to the Sharia courts to verify all heirs, wills, debts, and other rights before distributing the inheritance.