Is Hajj obligatory on behalf of the deceased who did not perform it despite being able to, and is it considered a debt that affects the distribution of inheritance among: a mother, a wife, 3 daughters, and 3 sons?

If the deceased, being capable, did not perform Hajj, then the heirs must expend from his estate what is sufficient for someone to perform Hajj on his behalf, before dividing the inheritance. This is because Hajj is a debt that takes precedence over the rights of the heirs. Then the estate is divided as follows: the mother receives one-sixth, the wife receives one-eighth, and the remainder goes to the sons and daughters by ta'sib (residuary heirship), with the male receiving the share of two females. The shares are distributed into 216 parts: the mother receives 36 parts, the wife receives 27 parts, each son receives 34 parts, and each daughter receives 17 parts.