Show how does an 8 bit subtractor below perform the same operation: 7-12 Write down the values of An, Bn, Sn & values from all the invertors (2.5%) ii) Label ALL the major gates that are only involved in the subtractor. FA = Full Adder. (2.5%) (b) i) A7 B7 A6 B6 A5 B5 A4 B4 A3 B3 A2 B2 A1 B1 AO BO SUE +8 FA FA FA FA FA FA FA FA S7 Cout +8 S6 S5 S4 S3 S2 S1