Please identify the status of the MOSFETS in the following amp Vin = Vin1 − Vin2 , Vout = Vout1 − Vout2 . V thp = −0.5 V, V thn = 0.5 V, Vb = 2.4 V, VDD = 3.3 V, and Vin1 = Vin2 = 2 V, after measurement, we found that Vc = 1.1 V, and Vout1 = Vout2 = 1.8 V. Please identify the status of the MOSFET M1-M4, including if it is turned on, and which operating region (triode or saturation) it belongs to.