Inheritance and deceased

Assalaamualiaikum Mufti Saheb.
How does one share the inheritance in the following situation:
The adult son with children (boys and girls) passses away before the father. Later the father passes away. Do the wife and children of the deceased son inherit from the fathers estate?
Similarly, if the daughter’s death preceeds the father’s, does her husband and children inherit from the fathers estate.
In the same way, do the spuose and children of the deceased son or daughter inherit from the mothers estate.
Jazakallah