

In the circuit shown below, $V_1$ and $V_2$ are bias voltages. Based on input and output impedances, the circuit behaves as a 
The $\dfrac{V_{OUT}}{V_{IN}}$ of the circuit shown below is _____________
The h-parameters of a two port network are shown below. The condition for the maximum small signal voltage gain $\dfrac{V_{out}}{V_s}$ is _____________