For an OPAMP with VDD = 3.3 V and input common-mode voltage (VCM) = VDD2, the MOSFET model parameters are listed in page B-9 of Appendix B on Smith's CD. (1) As shown in Fig. 1, please calculate vo vid(s) with its DC gain and pole locations, where vid = vin+ − vin−. (refer to Sections 8.5.3 and 9.7.2 in textbook). Then verify your results by PSpice with 0.5 μm CMOS model (in sedra_lib. lib). The sizes of all MOSFETs are listed below. (W/L)M1, M2 = 12 μm/0.5 μm (W/L)M5 = 2.5 μm/0.5 μm (W/L)M3, M4 = 5 μm/0.5 μm (W/L)M6 = 0.75 μm/0.5 μm