4 bit half adder

Drawing it out - 4 bit edition using Half Adders (2 pt) Open up a circuit drawing tool such as https://www.circuitlab.com/or https://creately.com/logic-gates-software and draw out the layout of the chip that would output the two's complement of a 4-bit number using NOT gates and Half Adders. You can abstract the Half Adder so that you can focus on the connections between the carry output of a half adder with the input of the subsequent Half Adder. The sum would be output of the chip. Using the snipping tool available in Windows or any other image software in your OS, copy the diagram in the space below, resizing it if necessary