8. Design a two-bit up and down counter using two JK flip-flops (A and B) and a U input. This counter has four states, 00, 01, 10, and 11. When input U-1, the counter counts up, i.e 00, 01, 10, 11, and back to 00; and when input U-0, the counter counts down, 10, 00, and back to 11. (l know that isn't straight down, but it makes for a much more interesting problem.) a) Create a state diagram