A$)$ Using the model circuit given in Fig$\mathrm{.}9,$ find the Thevenin equivalent circuit for the load resistor RL$.$ Use actual resistor values in your calculations. See lecture notes and sample problems for instructions on how a Thevenin equivalent circuit with dependent sources is determined.

B$)$ Using the Thevenin equivalent circuit found in step $9,$ determine the expression for the load resistor current and the power dissipated in it as a function of RL$.$ Call this current $($I L$)$ t and the power $($PL$)$ t

In the model circuit, $V_o$ is the voltage across the $2\mathrm{.}2k$ resistor and $$ is the control parameter and is determined by the following equation

$=-\frac{R_f}{R}$

where $R_f=2\mathrm{.}7k$ is the negative feedback resistor and $R=3\mathrm{.}9k$ is the input resistor to the op$-$amp. Note the negative sign in the equation.