a. One of the MOSFET amplifier circuits shown in FIGURE Q2a is designed for its optimal operating Q-point. Using a graph paper, plot the drain-source current versus gate-source voltage characteristic curve to estimate the Q-point and then calculate the drain-source voltage and source voltage. To ensure the graphical estimation is correct, determine the Q-point using numerical method, compare and discuss your answer. 18 VI 1.2 ΚΩ GND FIGURE Q2a IDSS 8 MA Vp=-8 V 0.39 kQ [20 marks] 4 V