A person deputizing another to throw the pebbles and traveling before they are thrown

Q 1: I hope that Your Eminence will give us a Fatwa on a person who threw pebbles on the second day of Tashriq (12th of Dhul-Hijjah), immediately left to Makkah, performed Tawaf-ul-Wada` (circumambulation of the Ka`bah on leaving Makkah), then returned to Mina intending departure, he found that some of his companions were lost, which caused him stay in Mina for the night preceding the third day of Tashriq (13th of Dhul-Hijjah). On the third day of Tashriq, he headed for Makkah and performed Tawaf-ul-Wada` once again because he spent the night at Mina. However, he did not throw pebbles on that day and after the second performance of Tawaf-ul-Wada` he departed to his country. What is he liable to, may Allah guard you? In case he is liable to slaughter a sacrificial animal, where should he slaughter it?

A: Since he returned to it (Mina) after he had left Mina on the 12th day of Dhul-Hijjah before sunset intending departure but he had to spend the night there on account of his companions being missing, he is liable to nothing.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.