6- Q1 and Q2 transistors in the network given below are n-channel E-MOSFETs and have the same threshold voltages (that is, VTH1 = VTH2 = VTH ) but different K values. a) Calculate the gain of the network and comment on it. b) Explain the physical reason why the gate currents are taken zero. c) Comment on the role of Q1 transistor in the network.