9. Oil flows inside a thin-walled copper tube of diameter Di=30mm. Steam condenses on the outside of the tube, and the tube wall temperature may be assumed to be constant at the temperature of the steam (150C). The oil enters the tube at 30C and a flow rate of 1.6kg/s. The properties of the oil are as follows: a. Calculate the inside heat transfer coefficient, hi, using the appropriate correlation. You should assume that the bulk oil temperature changes from 30C to 50C along the tube. b. Using the result from Part (a), calculate the length of tube required to heat the oil from 30C to 50C