Consider the circuit in Figure 1. (1) Given that the VTN = 3 V, k = 7 (A/V2), and the RDD = 0 (short circuit). Sketch and clearly labeled the iD−VDS diagram with VG is 2 V, 4 V, 6 V and with the VDS varying in the range from 0∼15 V (in the same diagram). (2) If the gate voltage is 6 V, find the transconductance and the resistance. (3) Find the minimum RDD that make the transistor work in the triode region when VG = 6 V and VDD = 15 V. Figure 1.