Find the Th$$venin equivalent circuit parameters $(V_{TH}$ and $R_{TH})$ of the network seen by terminal a$-$b in Figure

Circuit parameters: Vs$1=24$V ; R$1=6$ Ohm; R$2=3$ Ohm; R$3=2$ Ohm;

$Vth=12V$ Rth $=4$Ohm

$Vth=8VRth=4$Ohm

$Vth=9\mathrm{.}6VRth=5\mathrm{.}6$Ohm

$.Vth=6VRth=4$Ohm

$Vth=2\mathrm{.}5V$ th $=5\mathrm{.}5$Ohm