What is the share of each heir, and is it permissible for the daughters to perform a charitable act from the inheritance or to dispose of a part of it before its division, and are they sinful for spending from the money left for living expenses?

The deceased's money is the right of the heirs, and it is not permissible to dispose of it except with their collective consent. A bequest to an heir is void unless the remaining heirs consent, and the donee is not entitled to anything unless they take full possession of it. Inheritance matters are complex and require specialized authorities. If the deceased left only those mentioned, the wife receives one-eighth, the daughters two-thirds, and the remainder goes to the two paternal cousins by way of ta'sib (agnatic inheritance).