SOLVED: Create a VHDL code for a 4-Bit Adder/Subtractor using a full adder.4-bit full-adder circuit:Below is the schematic of the 4-bit full-adder subtractor you will implement in Lab 6. It has two inputs, A and B, which are both 4-bit numbers. The sum of these two numbers will also be 4-bit, plus a carry-out bit if overflow occurs.Selector bz@oUnsigned OverflowFAFAFAFASigned Overflow