. Using an adder, draw a circuit to increment or decrement an unsigned 6 PT 4-bit number, X = {X3 X2 X1 X0}. Let X connect to the adder A inputs and let the result be N = {N3 N2 N1 N0}. Ignore the carry-out. Let ID be the increment or decrement signal (0 = increment, 1 = decrement). Hint: Do not use the carry-in input.

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?