0.14kg/h of air enters the engine of a diesel truck with tubocharge. The air is heated up to 420 K in the compressor of the turbocharger unit. Before the air enters the engine, it is desired to be cooled to 392 K. Water can be supplied from the truck radiator at 380 K and a flow rate of 0.28kg/h. A counter-flow nested tube heat exchanger is used as an intercooler. The convection coefficient on the air side is 30W / (m^2 * K) and on the water side it is 1000 W / ((m ^ 2 * K)'). The air side is finned (eta_{f} = 1) and the air/water side area ratio is 5. According to this,
a) Heat exchanger effectiveness
b) Total heat transfer coefficient calculated according to the water side
c) Calculate the water side heat transfer area.