(1)
\Step 1:
\Find the Thevinins equivalent resistance.
\1.Open the load resistor.
\2.Open Current Sources and Short Voltage Sources.
\3.Calculate the Open Circuit Resistance. The resultant open circuit resistance is the thevenin Resistance (RTH).
\Redraw the circuit :
\The Resistors and
are in parallel.
.
The Resistors and
are in series.
Above resultant is in parallel with the resistor .
Above resistance comes in series with .