Draw the transistor-level schematic for the CMOS implementation of the following, and state the width of each transistor (in λ s) so that the pull-up and pull-down networks are balanced, assuming that an NMOS transistor is twice as fast as a PMOS (remember a minimum width would be 2λ, the speed scales proportionally to W (remember Req also scales the same way), and series and parallel transistors affect speed differently): a) 4-Input NOR gate b) Three Inverters in Serries