What is the share of the freed concubine mother and the half-siblings from the father's side in the inheritance of a deceased man?

The mother inherits one-sixth if she was freed before her son's death. The remainder is then divided among his paternal brothers and sisters, with the male receiving the share of two females. However, if the mother was freed after her son's death, she does not inherit, even if she was freed before the distribution of the estate.