The four-bit Fibonacci numbers are 0,1,2,3,5,8,13.

Provide the VHDL description for a circuit that accepts a four-bit input and outputs true if the input is a Fibonacci number

a) Use concurrent signal assignment with minimal logic functions.

b) Use structural VHDL, with AND and OR gates.

Alternatively, for part b, you can use case statements to implement the circuit.

c)Write a test bench to verify that your Fibonacci circuits are correct. Compare the output from one implementation to another. Your code should output an error bit to indicate errors and provide an adequate output log.