Design a 4-bit ALU that performs Arithmetic (add, subtraction), and Logic operations(AND, OR).

The following control signalsare to be considered

:

A/S: add/subtract (0:add, 1:subtract)

A/O: and/or (0:and, 1:or)

A/L: arithmetic/Logic (0:arithmetic, 1:logic)

R/W: read/write signal (0:read, 1:write)