At what age should a young girl be bathing herself, shampooing and conditioning her own hair etc.....?

Bathing maybe 6 or 7. Bathing, shampooing and conditioning her own hair on her own, I would think approx. 8 or 9.At what age should a young girl be bathing herself, shampooing and conditioning her own hair etc.....?
5 or 6At what age should a young girl be bathing herself, shampooing and conditioning her own hair etc.....?
I would say 12 or 13...maybe sooner if she has started her menstrual cycle.....she should always still be able to ask for help from her mother, a older sister or other female relative if needed
There were queens and princesses who did not do this. Young children NEED help. You must. But it does not mean because this is just what most do that you are a child if you were to take ideal to this accustom. However long they take. I prefer privacy.