• For a Ring Counter: 1. Design a simple 4-bit Ring Counter by using D flip-flops. The counter should count in the following order: 1000, 0100, 0010, 0001, 1000, 0100, 0010, 0001, 1000, 0100..... 2. What is the least number of flip-flops needed to design a 4-bit Ring Counter? How many 74LS74 chips do you need? 3. Include in the design a means for resetting the counter to 1000. 4. Provide circuit diagrams, relevant truth tables, state diagrams and state tables.