2. 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 8 or 9, 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 d flip-flops in your circuit.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?