Problem 4: MOSFET inverse modeling 24 pts Consider the following device:What is Vtn ? What is the region of operation of C ? What is the region of operation of D ? What is ro at point A ? What would ID be at VDS = 10 V and VGS = 5 V ? (neglect channel length modulation)What would ID be at VDS = 15 V and VGS = 4 V ? (do not neglect channel length modulation for this one)