For the given two port network, the y-parameter y11 and y12 are:
1
\({y_{11}} = \frac{{{s^2} + 1}}{{s\left( {{s^2} + 2} \right)}},{y_{12}} = \frac{1}{{s\left( {{s^2} + 2} \right)}}\)
2
\({y_{11}} = \frac{{{s^2} + 1}}{{s\left( {{s^2} + 2} \right)}},{y_{12}} = \frac{{ - 1}}{{s\left( {{s^2} + 2} \right)}}\)
3
\({y_{11}} = \frac{{{s^2} + 2}}{{s\left( {{s^2} + 1} \right)}},{y_{12}} = \frac{1}{{s\left( {{s^2} + 1} \right)}}\)
4
\({y_{11}} = \frac{{{s^2} + 2}}{{s\left( {{s^2} + 1} \right)}},{y_{12}} = \frac{{ - 1}}{{s\left( {{s^2} + 1} \right)}}\)