#9. We wish to design a 4-bit binary-coded decimal (BCD) input single output logic circuit that will be used to distinguish bits that are greater than or equal to 5 from those that are less than 5. The input will be the BCD representation of the decimal digits 0, 1, 2000 9, and the output should be 1 if the input is 5, 6, 7, 8, or 9, while the output should be 0 if the input is less than 5. A suggestion would be to write down the truth table for this logic function, and a requirement is to simplify the logical expression for the output as much as possible. (Hint beware of don't care conditions)