Question 4
The identity element with respect to the multiplication shown in the table below is:
| X | Y | Z | W | |
| X | W | Z | X | W |
| Y | Z | W | Y | X |
| Z | X | Y | Z | W |
| W | X | Y | W | Z |
Objective
| X | Y | Z | W | |
| X | W | Z | X | W |
| Y | Z | W | Y | X |
| Z | X | Y | Z | W |
| W | X | Y | W | Z |