heat transfer

A counter flow heat exchanger is used to cool engine oil by transferring heat to a flow of 40% ethylene glycol- water solution. The engine oil enters the heat exchanger at 85C with a mass flow rate of 0.023kg/s. The ethylene glycol enters the heat exchanger at 22C, with a mass flow rate of 0.012kg/s. If the conductance of the heat exchanger, UA=41.07W/K, using - NTU method, determine: a) the rate of heat transfer, b) the exit temperatures of the two fluids. (Cp,engineoil=1901J/kg.K,Cp-ethyleneglycol=3539J/kg.K)(20 points )