Show how does an 8 bit subtractor below perform the same operation: 7-12 i) Write down the values of An, Bn, Sn & values from all the invertors. ii) Label ALL the major gates that are only involved in the subtractor. FA= Full Adder.

(b) Show how does an 8 bit subtractor below perform the same operation: 7-12 i) Write down the values of An, B., S. & 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%) FA $0 Bit-> 7 6 5 4 3 2 1 An Bn Sub Sn