11) Which four-input logic gate does this circuit implement?
A) AND
B) OR
C) NAND
D) NOR
E) None of the above
12) What Boolean function does this circuit implement?
A) F = W + X + Y + Z
B) F = WX + XY + YZ
C) F = WXYZ
D) None of the above
13) What type of gate does the circuit on the right implement?
A) 2-input AND
B) 2-input NOR
C) 2-input NAND
D) 2-input OR
E) None of the above