The Z-parameter of the two-port network shown in the figure is
1
\(\left[ {\begin{array}{*{20}{c}} {{R_3}}&{{R_2}}\\ {{R_1} + {R_3}}&{{R_1}} \end{array}} \right]\)
2
\(\left[ {\begin{array}{*{20}{c}} {{R_3}}&{{R_2}}\\ 0&{{R_1} + {R_2}} \end{array}} \right]\)
3
\(\left[ {\begin{array}{*{20}{c}} {{R_3}}&{{R_2}}\\ {{R_2}}&{{R_1} + {R_2}} \end{array}} \right]\)
4
\(\left[ {\begin{array}{*{20}{c}} {{R_1} + {R_3}}&0\\ 0&{{R_2}} \end{array}} \right]\)