Three networks are connected in cascade as shown below:

A B C D parameters of the system is:
$$\begin{bmatrix}A & B \\C & D \end{bmatrix} = \begin{bmatrix}2.0\angle-10^\circ & 5\angle 30^\circ \\1.0\angle-20^\circ & 4.0\angle 10^\circ \end{bmatrix}$$
What is the value of $$Z_2$$?

A

$$5 \angle 30^\circ$$

B

$$2 \angle 10^\circ$$

C

$$0.2 \angle 20^\circ$$

D

$$1 \angle 20^\circ$$