$1)$Create a truth table in which you enter the conductivity of the paths from VDD to y or from y to GND$.$

$2)$Use this to determine the logical function y $=$ f$($x$2,$ x$1,$ x$0)$ that describes the gate shown in Fig. $11.$ from what I know pull down network's boolean expression and pull up network's boolean expression should be the same. Upper network gives: $($x$0+$x$1+$x$2)\text{'}$ and lower network gives $($x$0($x$1+$x$2))\text{'}$ first of all why is it this way? Secondly if this case not odd please explain how to create a truth table