Water is used for both fluids (unmixed) flowing through a single-pass, cross-flow heat exchanger. The hot water enters at \(80^{\circ} \mathrm{C}\) and \(15,000 \mathrm{~kg} / \mathrm{h}\), while the cold water enters at \(10^{\circ} \mathrm{C}\) and \(18,000 \mathrm{~kg} / \mathrm{h}\). If the effectiveness of the exchanger is \(65 \%\), determine the cold and hot water exit temperatures and the heat transfer surface area. The overall heat transfer coefficient is \(U=340 \mathrm{~W} / \mathrm{m}^{2} \cdot \mathrm{K}\).