A shell-and-tube heat exchanger is required to be designed to lower the temperature of 150,000 lbm/h of toluene from 200F to 140F. Cooling water available at 90F is to be used for this purpose where the outlet temperature of the cooling water is not to exceed 120F. The toluene stream is cleaner than water and has 1/4 times the fouling factor of water which 0.002hft2F/B tu You are asked to calculate the design overall heat transfer coefficient of the shell-and-tube heat exchanger desired for this service. Do single trial only