Brown and Vranesic. Problem 6.28 - Repeat Problem 6.26 using T flip-flops. (That is: Design a three-bit counterlike circuit controlled by the input w. If w = 1. then the counter adds 2 to its contents, wrapping around if the count reaches 8 or 9. Thus if the present state is 6 or 7 {correcting typo in text}, then the next state becomes 0 or 1, respectively. If w = 0, then the counter subtracts 1 from its contents, acting as a normal down-counter. Use T flip-flops in your circuit.) - Show: (a) state diagram and/or state table; (b) state assignment; (c) excitation table; (d) expressions for flip-flop inputs and circuit outputs.