Which of the following are true/correct about adder circuits? Select all that apply; scored equally weighted. Question 11 options: an N-bit adder can be formed by cascading half adder circuits to form a carry-ripple adder an N-bit incrementor can be formed by cascading (connecting in series) N half adder circuits the 1-bit "half adder" circuit and the 1-bit "full adder" circuit have the same number of inputs the 1-bit "half adder" circuit and the 1-bit "full adder" circuit have the same number of outputs the full adder circuit is more complex (requires more gates) than the half adder circuit