EXERCISE 5.3.24
(a) Use source transformation to find $V_o$ in the network shown below.
\begin{circuitikz}
\draw (0,0) to[isource, l_=2 mA] (0,2) to[R, l_=6 k$\Omega$] (2,2) to[R, l_=4 k$\Omega$] (4,2) to[vsource, l_=24 V] (4,0) to[R, l_=12 k$\Omega$] (2,0) to[vsource, l_=6 V] (0,0);
\draw (2,2) to (2,0);
\draw (4,2) to (4,0);
\draw (2,2) to[short, -*] (4,2);
\draw (2,0) to[short, -*] (4,0);
\draw (3.5,1) node[label={$V_o$}] {};
\end{circuitikz}
