$3-50.$ The element represented in the circuit shown in Fig. P$3-50($a$)$ is a gyrator which is described by the equations

$v_1=R_0{i}_2$

$v_2=-R_0{i}_1$

Find the two$-$element equivalent circuit shown in Fig. P$3-50($b$)$ of the figure.

$($a$)$