To travel for Hajj or for any other purpose

Q 1: is the Hajj that was performed by a lady without a Mahram (spouse or permanently unmarriageable relative) but with a good companionship of women sufficient for the obligatory Hajj?

A: If the reality is exactly as what is mentioned in the question, this Hajj is valid and sufficient for the obligatory one. However, the concerned lady committed a sin by travelling without a Mahram and she has to make Tawbah (repentance to Allah) and Istighfar (seeking forgiveness from Allah).May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.