What is the share of each heir in the following cases: 1. Grandfather, full sister, and paternal half-sister? 2. Husband, maternal grandmother, and paternal grandmother? 3. Grandfather, full sister, and two paternal half-sisters? 4. Full sister, paternal half-brother, paternal half-sister, and grandfather?

The inheritance of someone who left behind a grandfather, a full sister, and a half-sister through the father is divided as follows: the grandfather receives half, the full sister receives the other half, and the half-sister through the father receives nothing. This is because when a grandfather is present with siblings (brothers or sisters), he takes the better of either one-third of the inheritance or a share as if he were a brother to them.

As for a woman who left behind a husband, a maternal grandmother, and a paternal grandmother (a grandmother from the mother's side and a grandmother from the father's side), her husband receives half due to the absence of a direct heir. The remaining portion goes to the two grandmothers, both as their obligatory share and by رد (return, i.e., receiving the remainder of the inheritance).

As for someone who died leaving a grandfather, a full sister, and two half-sisters through the father, the grandfather shares with the sisters as if he were a brother to them. Thus, the grandfather takes two out of five shares, and each sister takes one share. Then, the full sister claims her obligatory share, which is half, from the two half-sisters through the father. A remaining half is left for the two half-sisters through the father, to be divided equally between them. The calculation is correctly derived from twenty shares: eight for the grandfather, ten for the full sister, and one for each of the two half-sisters through the father.