4. Using the property that: xo y = x + y = xy show that a half subtractor can be implemented using a "Half Adder" device and two inverter gates. Build and test this circuit with the truth table. Write the expressions of the difference and the borrow beside the circuit. Hand-In o The half subtractor circuit using the "Half Adder" device and two NOT's o Boolean functions for Difference and Borrow (will be slightly different from 3, because of inverters--consider what is going into the box and what is coming out of the box) 5. A full subtractor can be built using two "Half Subtractor" devices and an OR gate 4. Using the property that: xo y = x + y = xy show that a half subtractor can be implemented using a "Half Adder" device and two inverter gates. Build and test this circuit with the truth table. Write the expressions of the difference and the borrow beside the circuit. Hand-In o The half subtractor circuit using the "Half Adder" device and two NOT's o Boolean functions for Difference and Borrow (will be slightly different from 3, because of inverters--consider what is going into the box and what is coming out of the box) 5. A full subtractor can be built using two "Half Subtractor" devices and an OR gate