Using the two T flip-flops (flip-flops are l'8design 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 the design what is the output equation yo? Characteristic Table T Flip Flop 100+1). 0 QCV) 1 0 0 Select one: a. y(t) = A(C) and x(0) b.y(t) = A(C) or B(C) cy(0= B(l) or x(0) d. (O) = A(C) and BO e. yo = B(t) and x(0)