HELP!! How to make my Mixamo Character sit on a CHAIR?? A* Pathfinding + Mixamo Animation

I'm a newbie in Unity and your help will be greatly appreciated. This is for my undergraduate thesis. I'm using A* Pathfinding to make my Mixamo Character (with walking animation) to search for a target which is the chair. That goes well but I want to know how to make my Maximo character sit on that chair?? I do have a sitting animation wherein from standing idle, the character will sit. The character is in generic and if I change it into humanoid the animation will not work.

To be clear, how will I make my Character sit on that chair?