How is the estate of the deceased distributed if he has one son, two daughters, and two granddaughters from a son?

If the deceased leaves behind only a son and two daughters, the inheritance is distributed to them by ta'sib (residuary heirship), with the male receiving the share of two females. The granddaughters receive nothing, as they are completely excluded by the son. The inheritance is divided into four shares: two shares for the son, and one share for each daughter. It is advisable to refer inheritance matters to the Sharia courts for investigation.