Ece 342 Electronic Circuits Spring 2016 Problem Set 3 Due Date 00am Feb 12 Nmos

Im working on my circuits homework and am stuck on questions 5. I see they are all nmos transistors operating in saturation. My first equation is a voltage divider rule relating R1 and Vgs of the farthest left transistor. Im not sure if this is correct as there is a resistor of 1kOhm under that transistor. From there I am lost.