Engineering thermodynamic. Please provide me the answer suitable with the marks allocation.Thankyou

QUESTION 4 (7 Marks) A mercury manometer (Density 13,600 kg/m2) is connected to an air duct to measure the pressure inside. The difference in the manometer levels from point 2 to the liquid surface is 17 mm, and the atmospheric pressure is 100 kPa. (a) Judging from the diagram in Figure 1, determine if the pressure in the duct is above or below the atmospheric pressure. (1 Mark) (b) Determine the absolute pressure in the duct without neglecting the air column (down to point 1) hydrostatic pressure. (3 marks) (C) Is it acceptable to neglect the air column hydrostatic pressure in the measurement and why? (1 Mark) = (d) Since mercury is toxic, it is decided to replace it with a fluid of specific gravity (SG) 0.85. What would the height h become? (2 marks) Air U QUESTION 4 (7 Marks) A mercury manometer (Density 13,600 kg/m2) is connected to an air duct to measure the pressure inside. The difference in the manometer levels from point 2 to the liquid surface is 17 mm, and the atmospheric pressure is 100 kPa. (a) Judging from the diagram in Figure 1, determine if the pressure in the duct is above or below the atmospheric pressure. (1 Mark) (b) Determine the absolute pressure in the duct without neglecting the air column (down to point 1) hydrostatic pressure. (3 marks) (C) Is it acceptable to neglect the air column hydrostatic pressure in the measurement and why? (1 Mark) = (d) Since mercury is toxic, it is decided to replace it with a fluid of specific gravity (SG) 0.85. What would the height h become? (2 marks) Air U