(a) Find an expression for the gain \(i_{\mathrm{O}} / v_{\mathrm{S}}\) Figure \(\mathrm{P}_{4}=7\) in terms of \(R_{\mathrm{X}}\).

(b) Select a value for \(R_{\mathrm{X}}\) so that the gain is -0.002 .
(c) Simulate the circuit in Multisim and perform a parameter sweep on \(R_{\mathrm{X}}\) from \(10 \Omega\) to \(10 \mathrm{M} \Omega\) and using the cursor to find the required value of \(R_{\mathrm{X}}\). How does your answer compare with part (b)?

VS (+1 1 - Rx + 103 vx io 10