Using the two T flip-flops (flip-flops are TX78) design a two bit synchronous up-down binary counter with input x. If x=1, counter counts up from 0 to 3 continuously. If x=0, counter counts down from 3 to O continuously. Output y should be one when counter equals maximum number. Depens on your design what is the input equation of the flip-flop ? Characteristic Table T Flip-Flop 10(+1) 0 QW 090 Select one: O a. T8 = 1 o b.78= B(0) OC. T8 = x(t) o d.18 = 0 Oe. To = A(0)