Use source transformation to find $R_{eq}$, $I_{eq}$ and $V_{eq}$ for each network given that $V_1 = 5 V, I_1 = 7 mA, R_1 = 9 k\Omega$ and $R_2 = 43 k\Omega$.

Circuit (a):
$R_{eq} =$ $k\Omega$
$I_{eq}=$ $mA$
$V_{eq}=$ $V$

Circuit (b):
$R_{eq} =$ $k\Omega$
$I_{eq}=$ $mA$
$V_{eq}=$ $V$

Circuit (c):
$R_{eq} =$ $k\Omega$
$I_{eq}=$ $mA$
$V_{eq}=$ $V$