The total and static pressure at the inlet of a stream nozzle are 186 kPa and 178 kPa respectively. If the total pressure at the exit is 180 kPa and static pressure is 100 kPa, then the loss of energy per unit mass in the nozzle will be
(a) 78 kPa (b) 8 kPa
(c) 6kPa (d) 2 kPa