How would I complete the truth tables for these logic gates?  How do I know whether the transistor is closed (c) or open (o) for each '1' or '0' as listed for F outputs?

Design an exclusive nor (XNOR) gate using only 74HC02 NOR gates. (Pin outs shown below). Complete your design by first drawing the truth table for the XNOR gate, simplify, and then draw the logic including pin numbers, Vec and ground for the dual inline package. This is to be a build ready design. Be sure to account for unused gates.

Please do part b using the Assumption

Implement the logic circuit in Figure 2 using only NAND gate A B C X