The Z parameters Z11 and Z21 for the 2-port network in the figure,
`Z_11 = -6/11Omega`; `Z_21 = prop16/11 Omega`;
`Z_11 = 6/11 Omega`; `Z_21 = 4/11 Omega`
`Z_11 = 6/11Omega`; `Z_21 = -16/11Omega`;
`Z_11 = 4/11Omega`; `Z_2 = 4/11Omega`;
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