3. Nitrogen is flowing at steady state through a well-insulated diffuser with inlet conditions of P1 = 0.656 bar, T1 = 300 K and V = 292 m/s. The exit conditions of the nitrogen flow are P2 = 0.9 bar and 2 = 130 m/s. The inlet area is A1 = 4.8 x 10- m. (a) What is the extensive entropy change rate (kJ/K/s) for the process using cold air standard assumptions? (b) What is the area at the exit assuming cold air standard assumptions?