For the differential amplifier of Fig. 9.14, let VCC = +5 V and IRC =4 V. Find the differential gain Ad . Sketch and clearly label the waveforms for the total collector voltages vC1 and vC2 and for (vC2 -vC1) for the case: vB1 = 1+0.005 sin(ωt) vB2 = 1-0.005 sin(ωt)