Problem 1. Design a D-FF based counter that steps thru the even numbers 0 thru 6 before it repeats. Assume the circuit starts in state 0. Normal operation is thus: . Deal with the unused odd number states using "don't care conditions. Use K-maps to derive D-FF inputs. Use only "don't cares" that can be grouped with 1s. Having completed your design, carry out a circuit analysis to determine the behavior for all states. Draw the resulting state diagram