5.9 A heat exchanger is being used to cool 48,000 lbm/h of oil from 150°F to 102°F by using 32,000 lbm/h of water at an inlet temperature of 70°F. The overall heat transfer coefficient is determined to be 136 Btu/h·ft²·°F. The average heat capacities of the oil and water can be taken as 0.5 and 1.0 Btu/lbm·R, respectively.

Determine the heat transfer area required for counterflow and parallelflow configurations.