A.) Formulate the node-voltage equations for this circuit and arrange in matrix form Ax=s in terms of the node voltages $V_A$, $V_B$, $V_C$, the resistances $R_1$-$R_5$, and the source magnitude $V_s$.
B.) Now use the component values:
$R_1$=1k$\Omega$
$R_2$=1k$\Omega$
$R_3$=1.5k$\Omega$
$R_4$=1k$\Omega$
$R_5$=1.5k$\Omega$
$V_s$=5V
And solve for the node voltages $V_A$, $V_B$, $V_C$, and $V_D$.