More about Virtual / new…plus interfaces!

Question

Yesterday I posted a question about the new/virtual/override keywords, and i learned a lot from your answers. But still i remain with some doubts.

In between all the

Answer 1

In addition to other answers I am posting a correct answer:

            A a = new B();
            a.Draw(); //A::Draw

            I1 i1 = new A();
            i1.Draw(); //A::Draw

            I2 i2 = new B();
            i2.Draw();// B::Draw

            B b = (B) a;
            b.Draw();// B::Draw