(b) Figure 1 is a multifluid manometer involves Benzene (SG=0.88), Kerosene (SG=0.8) and Mercury (SG=13.5). Determine the pressure difference between A and B. Kerosene Air Benzene 40 cm 9 cm 20 cm T8 cm 14 cm Mercury Water Figure 1. Multifluid Manometer (6 marks) (c) Determine the head loss when water flowing through an enlargement from a 4 cm to a 5 cm diameter pipe, at a speed of 7500 litre per hour. (5 marks) (d) Water is being delivered at a rate of 0.015 m/s using a centrifugal pump that requires a power rating of 4.2 kW. If the efficiency of the pump unit is 65%, calculate the head of pump