1. For number one, I know there is one OR gate and 2 XOR(?) gate, how does one combine it, I really really don't remember.
2. Basically following number 1, following this website: http://www.play-hookey.com/digital/basic_gates.html I can tell that all of it is (+) right?
I just want to start with 1 & 2 so I can relearn it, I'll work on the rest in a bit. Thanks in advance.