Design a 16-bit Comparator with maximum of 4 bits of Lookahead. Propagation of signals is from LSB to MSB. a) Show the design of 1-bit comparator b) Show the block diagram for 4-bit comparator c) Develop a look ahead scheme for the 4-bit block with (AB) signals being propagated from LSB to MSB. d) Develop a block-level lookahead scheme for 16-bit Comparator