Abstract class with interface: generalization or implementation?

Question

OOP

The question is simple: if an interface is added to an abstract class, but not implemented in the abstract class, then on the class diagram from the abstract class to the interface, you need to draw a solid empty arrow or is it still dotted?
Well, if a partial implementation of an interface is in an abstract class, then how is it customary to reflect this on a diagram?

Answer 1

About the interface "know" without any tricks. In any case, it's dotted.