Hajj-e-Badal

What should be done with the excess money that remains after performing Hajj-e-Badl?

Q: In the case where the deceased did not perform his fardh hajj, and before passing away, he appointed someone to perform his fardh hajj (Hajj-e-Badl) from one third of his wealth, then after performing the Hajj-e-Badl, if any money remains from the one third of the estate, what should be done with the remainder money?

Will Hajj-e-Badl be compulsory if one delayed in performing Hajj and then passed away during the journey of Hajj?

Q: Explain the ruling of a person who delayed in performing hajj after it became fardh upon him and only set out for hajj after one or a few years, and then passed away during the journey of hajj. Does Hajj-e-Badl have to be performed on his behalf?