Design the Arithmetic Unit (Z points) and Logic Unit (3 points) of a 4-bit Arithmetic Logic Unit (ALU) based on the following truth table. You must show the K-Map minimization wherever applicable (may show the minimization for only one output bit). S3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 S2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 Si 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 So 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Operation G=X+Y G=X+Y+1 G=X-1 G= X G= X G= X + 1 G= X + Y' G=X+Y' + 1 X NAND Y X AND Y X NOR Y XOR Y X X XOR Y No Operation X Ex-NOR Y The symbol and truth table of Ex-NOR gate is as below: Symbol Truth Table B 0 . 1 =1 BO 0 1 0 2-input ExNOR Gate 1 0 0 1 1