Practice problem for serial adder circuits. Design an 8-bit serial adder/subtractor. Assume that the operands are placed in serial shift registers A and B and the sum/difference is to be stored in a third register C depending on the values of the control inputs X and Y. Register transfer operations are shown below: (10 marks) X'. Y':CEA X'. Y: CE A+B X. Y: C-A - B X. Y: CEB Dracticanroblem for cignadsarialadder circuits Practice problem for serial adder circuits. Design an 8-bit serial adder/subtractor. Assume that the operands are placed in serial shift registers A and B and the sum/difference is to be stored in a third register C depending on the values of the control inputs X and Y. Register transfer operations are shown below: (10 marks) X'. Y':CEA X'. Y: CE A+B X. Y: C-A - B X. Y: CEB Dracticanroblem for cignadsarialadder circuits