Fluid Mechanics. Please need the solution ASAP. Dont skip any step please.

Question 1 (23 Marks) (a) A 65 litre tank is filled with 0.15 kg of gas X. The gauge pressure and temperature of the tank are 105 kPa and 27 C, respectively. Deduce what gas X is. Assume atmospheric pressure is 101 kPa. marks) (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 Benzene Air B 40 cm 19 cm 20 cm 14 cm T8 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. (6 marks)