Problem #1 An up/down counter counts up or down depending on the value of a binary control signal x (x = 1 for up, x = 0 for down). Design a modulo-7 counter using Three T flip-flops 2) Three D flip-flops 3) Two T flip-flops (for the two least significant bits) and one D flip-flop. You are also allowed to use basic logic gates Here is the definition of T flip-flops If the T input is high, the T flip-flop changes state ( "toggles") whenever the clock input is strobed. If the T input is low, the flip-flop holds the previous value. The truth table and symbol are shown below 0