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Norton theorem

$3.$ Consider the circuit shown in Figure $3.$ Estimate the Norton equivalent circuit between terminals A and B$.[20$ points$]$

$4.$ Figure $4$ shows an AC circuit with a current$-$controlled voltage source $($CCVS$).$ Estimate the Norton equivalent circuit between terminals a $\backslash$& b$.[20$ points$]$

$5.$ For circuits shown in Figure $1$ and Figure $3,$ find the load impedance for maximum power transfer, and estimate the power delivered. $[20$ points$]$