Study Questions: Incarnation & Hypostatic Union

It's that time of the week again; time for some more doctrinal study questions!
This week we're beginning to look at Christology (& Tenet No. 3).

What is the Incarnation?

Does the Bible teach that God the Son existed before the Incarnation? Explain.

How do we know that Jesus was truly human?

What is Docetism & why is it such a big problem?

What is Apollinarianism & why does it cause problems for the doctrine of salvation?

What is the Hypostatic Union? How do the heresies of Nestorianism & Eutychianism help us define the Hypostatic Union?

Is Christ still incarnate? Why is this important?