No ! since static method is not instance method or it will never call by instance by object. Hence you cant make pure virtual function as static

1:because static method can't be inherit.

2:we make pure virtual function to achive late binding and late binding is not possible without pure virtual function

No . u can't.

A static member cannot be marked as override, virtual, or abstract

No, you cann't make virtual function as static

I have no idea.