(shell and tube heat exchanger) water flowing at a rate of 3.8 kg/s is heated from 38°c to 55°c in the tubes of a shell-and-tube heat exchanger. the shell side is one-pass with water, flowing at 1.9 kg/s, entering at 94°c. the overall heat transfer coefficient is 1420 w/(m2*k). the average water velocity in the tubes (1.905 cm inner diameter with a wall thickness of 0.5 cm) is 0.366 m/s. because of space limitations, the tubes may not exceed 2.44 m in length. determine the required number of tube passes, the number of tubes per pass, and the length of tubes consistent with this restriction.