Question 6 (20 points: Give short but clear and concise answers to the following questions (2 points each if clear and correct): a What is the difference between a haif adder and a full adder? (b) In how many time units (time for a ful adder to perform an operation) does a 16-bit Ripple Carry adder complete an addition? (c) How many select lines are needed in a 9-t0-1 multilplexer? How do you kow? (d) How many input lines does a line endecoder with 4 outpuis have? How do you know? How many outputs are " at any given time in a decoder with 4 inputs (nol including "Erable")? () What is the essential difference between a standard line encoder and a priority encoder