Q2: You are asked to design a BCD-Excess4 system. Its input would be a BCD digit (0-9) and output would be 4 more than the input. Page 3 of 3 a) How many inputs and outputs should the circuit have? b) Would there be any don't cares? If yes, which minterms would be don't cares? c) Minimize the least significant output column using K-maps