The Torah in Vayikra 12:1-5 states a woman is separated like a niddah after childbirth. Does this law apply to egg donors whose eggs are fertilized in another woman?

In Halacha, is there an order of priority for who gets to wash Mayim Achronim first or last? So say multiple people are eating together, and one is a kohen or Levi or Talmid chacham or your parent, do you have to let them wash first (assuming everyone there practices it)? What if you finish eating before them?

According to Halacha, may a Jew sue another Jew through a beit din for the actions of a corporation the other Jew is invested in if that corporation is a limited liability structure under secular law? The reason I ask is because on the one hand it could be considered like they are exempt from personal liability due to Dina D’malchuta Dina but on the other hand since third parties didn’t consent to the limited liability contract it arguably doesn’t apply. In this case all/most shareholders are also Jews but nobody has a majority vote