Question#$2$: In the circuit given below,

$($a$)$ Find the Th$$venin equivalent circuit seen by the resistor $RL.$

$($b$)$ Find $RL$ such that the maximum power is delivered to $RL.$

$($c$)$ Derive an expression for the maximum transferrable power to $RL$ in terms of $R_L,V_S,I_S,$ and $.$ You may assume that $$ is a positive constant.