Question: 7.10 We define the distance from the Gray code word a to the Gray code word b as the number of transitions from code word

7.10 We define the distance from the Gray code word a to the Gray code word b as the number of transitions from code word a to code word b. For example, consider the 4-bit Gray code words "0101" and "1111" as a and b. The distance from a to b is 4 since four transitions are needed (ie., "O101" "0100"-> "1100'> "1 101" "1 1 1 1"). Design a circuit to calculate the distance of two 4-bit Gray code words and derive the VHDL code
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