The binary-coded-decimal (BCD) format uses 4 bits to represent 10 decimal digits. For example, 259 is represented as "0010 0101 1001" in BCD format. A BCD incrementor adds 1 to a number in BCD format. For example, after incrementing, "0010 0101 1001" (i.e., 259) becomes "0010 0110 0000" (i.e., 26010). 1. Design a three-digit 12-bit incrementor and derive the code.