Could someone please help me understand what's required from the following questions?

Joseph is partnering with his two siblings in the endeavour and wishes to divide the ownership equally among them, but he also wants to protect them (along with himself) from full liability in the event that anything should go wrong in the business. Joseph would like to know which business structures would satisfy these needs, and which one you might recommend for his business. What are the applicable law or legal concepts that apply to this question?

Joseph is concerned about protecting the value of his unique baked good. He has named the restaurant "The Croissconenut" and he would like to be the only restaurant in town that uses that name for his bakery. He would like to obtain a Design on his signature baked good and is wondering if this is an appropriate form of protection. In addition, he is asking you to help him find a way to protect his intellectual property. What are the applicable law or legal concepts that apply to this question?