Hi JiYou, this forum fivearts.org has been around since late 2017 so it's been around 3 years now.
I have been focusing on the methodologies from Mangpai (Blindman School) for 5 years now. We still share the concepts with the traditional school. The definition of Qi phases (stages) that you asked is the same. The usage may vary somewhat. The concept of the Tomb Qi phase is elaborated much more in our Mangpai school.
Here are the answers to your questions:
Jia-Chen
A (Jia wood) - Stage 6 Aging
Xin-Wei
A - Stage 6 aging
Geng-Yin
A - Stage 10 repose -- well, stage 10 is 絕 Jue, and we'd rather use the translation "vanished" or "severed". "Repose" means resting...