use LogiSim to implement Half Adder (HA) and Full Adder (FA)using Logic Gates. You will also implement a 4-bit adder/subtractorcircuit using FA blocks provided by LogiSim. Save all circuits inone file
o   Implement a FA as described in class usingtwo XOR , two AND, and one OR gate.
o   Implements a 4-bit adder capable of addingtwo 4-bit values(A3A2A1A0 andB3B2B1B0) using singleFA blocks provided by LogiSim
Simulate the circuit for ten random combinations of ‘A’ and ‘B’.Record the input values and computed sums
provide answer in logisim or paper drawing
