The $Z$ parameters $Z_{11}$ and $Z_{21}$ for the $2$-port network in the figure,
- $Z_{11}=-\frac{6}{11} \; \Omega ; Z_{21}=\propto \frac{16}{11} \; \Omega$;
- $Z_{11}=\frac{6}{11} \; \Omega ; Z_{21}=\frac{4}{11} \; \Omega$;
- $Z_{11}=\frac{6}{11} \; \Omega ; Z_{21}=-\frac{16}{11} \; \Omega$;
- $Z_{11}=\frac{4}{11} \; \Omega ; Z_{21}=\frac{4}{11} \; \Omega$;