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I am solving for the Y and Z parameters for the circuit below:

For Y, I used the following equations by applying current sources at the terminals

v

(v

I

I

I got Y = [3 -2/3; 0 8/3]

For Z, I used KVL by applying voltage sources at the terminals

v

0 = I

0 = I

v

where I

I got Z = [1/3 1/6; 0 1/3]

I am not sure what I am doing incorrectly here. Y should be equal to Z

For Y, I used the following equations by applying current sources at the terminals

v

_{a}is the node at the 2v_{1}dependent source(v

_{a}-v_{1})/0.5 + (v_{a}-v_{2})/1 = -2v_{1}I

_{1}= v_{1}/1 + (v_{1}-v_{a})/0.5I

_{2}= v_{2}/0.5 + (v_{2}-v_{a})/1I got Y = [3 -2/3; 0 8/3]

For Z, I used KVL by applying voltage sources at the terminals

v

_{1}= I_{a}- I_{b}0 = I

_{b}- I_{a}+ 0.5I_{b}0 = I

_{c}+ 0.5(I_{c}+ I_{d})v

_{2}= 0.5(I_{c}+ I_{d})where I

_{a}= I_{1}, I_{b}= 2v_{1}, I_{c}= -2v_{1}, and I_{d}= I_{2}I got Z = [1/3 1/6; 0 1/3]

I am not sure what I am doing incorrectly here. Y should be equal to Z

^{-1}, but I am not getting that. I'm not sure if my Y parameters are wrong, Z parameters, or both. :\
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