Is it obligatory on us to perform

Q 2: The deceased left 6 sons and other heirs. The sons want to perform Hajj on his behalf. Which one of them is entitled to perform Hajj on his behalf? Should they pay the Hajj expenses from the inheritance or from their own money?

(Part No. 11; Page No. 107) A: If the one who will perform Hajj on his behalf is a volunteer, any or all of them may perform it on his behalf in one year or more so long as they have previously performed the obligatory Hajj for themselves. If the one who will perform Hajj on his behalf is paid, they may consult the deceased's lawyer or if he is unavailable, the court may decide the matter.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.