1. Represent decimals 0 to 9 in four-bit 6-3-1-1 code. 2. If the word length is n = 4 bits (including sign), what decimal number does 10002 represent in sign and magnitude? In 2's complement? In l's complement? 3. What is meant by overflow? How can you tell that an overflow has occured when performing I's or 2's complement addition? 4. Is it possible to construct a 5-4-1-1 weighted code? Justify your answer. 5.4 Short Theory Questions 1. How many selection lines are needed for 8 x 1 multiplexer? Chapter 2. Draw the block diagram of 4 x l multiplexer with selection inputs. ctors 3. What is a decoder? 4. If the sum S = rey and carry C = r.y then draw the block diagram to implement %3D a full adder using multiplexers?