A simple concentric tube heat exchanger is used to cool a sauce from 70 degrees Celsius to 10 degrees Celcius. The inner tube has internal and external diameters of 50mm and 55mm respectively and the outer tube has an internal diameter of 110mm. The water flows in the annulus at a velocity of 2m/s and sauce flows in the inner tube at a rate of 2kg/s. Determine Reynold's number for each fluid. Data for the sauce at 40 degrees Celcius, density= 1042kg/m3, viscosity= 0.190Pa s. Take the properties of water at 5 degrees Celcius.