Consider the ideal inverting summing amplifier in Figure 9.14 (a) with parameters \(R_{1}=40 \mathrm{k} \Omega, R_{2}=20 \mathrm{k} \Omega, R_{3}=60 \mathrm{k} \Omega\), and \(R_{F}=120 \mathrm{k} \Omega\).

(a) Determine \(v_{O}\) for \(v_{I 1}=-0.25 \mathrm{~V}, v_{I 2}=+0.10 \mathrm{~V}\), and \(v_{I 3}=+1.5 \mathrm{~V}\).

(b) Determine \(v_{I 1}\) for \(v_{I 2}=+0.25 \mathrm{~V}, v_{I 3}=-1.2 \mathrm{~V}\), and \(v_{O}=+0.50 \mathrm{~V}\).

Figure 9.14(a):-

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