a) In the circuit shown in Fig. (3), assume ideal op amp and VCC = 12 V, i. Derive an expression for vo in terms of the inputs v1 and v2 and the resistors. Then, express vo in terms of the inputs v1 and v2 if R2/R1 = R4/R3 and give a function for the circuit. b) In the circuit of Fig. (3), consider that R1= 2 K, R2= 10 K, R3= 4 K and R4= 16 K, Draw the waveform of vo if v1 is a sinusoidal signal given by v1 = 2 sin (2000t) and v2 is a DC of 1 V and find the average value of vo.

Fig