*14.127. Find the Q-points of the transistors in Fig. P14.127. if VDD = VSS = 7.5 V, IREF = 250 μA, (W/)12 = 4 O1, Kn′ = 50 μA/V2, VTN = 0.75 V, Kp′ = 20 μA/V2, and VTP = −0.75 V. What is the differential-mode voltage gain of the op amp if λ = 0.017 V−1 for both transistor types? What is the offset voltage of the amplifier?