For the two-port network shown in the figure, the impedance (Z) matrix (in $\Omega$) is

- $\begin{bmatrix} 6 & 24 \\ 42 & 9 \end{bmatrix}$
- $\begin{bmatrix} 9 & 8 \\ 8 & 24 \end{bmatrix}$
- $\begin{bmatrix} 9 & 6 \\ 6 & 24 \end{bmatrix}$
- $\begin{bmatrix} 42 & 6 \\ 6 & 60 \end{bmatrix}$