(b) Water (Cp=4.183kJkg1C1) enters a double pipe heat exchanger at 40C at a rate of 1.166kgs1 and leaves at 85C. Hot oil enters the jacket of the heat exchanger at 120C and flows at a rate of 3.69kgs1. If the heat capacity of the oil is 1.7kJkg1C1 and the overall heat transfer coefficierit based on the inside area of the heat exchanger is 400Wm, determine: (i) the outlet temperature of the oil leaving the exchanger; (ii) the rate of heat transfer assuming negligible heat loss: (iii)the heat transfer area required. (c) Determine the heat transfer area required if the identical operation in part (b) above was to be carried out in a parallel flow double pipe heat exchanger. Compare the areas required for the co- and counter current (part b) operations and comment on the values. (d) The heat transfer in part (b) is to be carried out in the same counter-current equipment but at a reduced water flow rate of 0.833kgs1. If the initial water temperature and the oil flow rate and temperatures remain unehanged, determine the heat exchanger effectiveness and hence the exit water temperature under these conditions. Refer to Appendix 1. Comment briefly on the impact of reducing the water flow rate on the efficiency of heat transfer in the equipment