What is the share of each of the mother, the only daughter, and the wife from the inheritance?

If a person passes away leaving only a mother, a wife, and a daughter, then the wife receives one-eighth due to the presence of a lineal descendant, and the mother receives one-sixth due to the presence of a lineal descendant, and the daughter receives one-half. The remainder is returned to the mother and the daughter, but not to the wife. The inheritance is divided into 32 shares: the wife receives 4 shares, the mother receives 7 shares (as a prescribed share and by رد [return]), and the daughter receives 21 shares (as a prescribed share and by رد [return]). Inheritance cases must be referred to Sharia courts for investigation, as there might be wills, debts, or rights that take precedence over the heirs' rights, which the heirs may not be aware of.