A heat exchanger is used to cool oil (with cp=2.2 kJ/kg.∘C ) from 170 to 50∘C by water (with cp=4.18 kJ/kg.∘C ) that enters the heat exchanger at a rate of 2 kg/s and inlet temperature of 10∘C. If the flow rate of the oil is 1.5 kg/s, determine the exit temperature of water and the heat transfer rate from the oil.