Question 3 For the manometer shown in the figure: a) Determine the gage pressure at point A in kPa. b) If the atmospheric pressure is 737mm of mercury, express the pressure at point A in kPa(abs). c) It is desire to remove the mercury from the tube and replace it by pressurized air with a sealed end. What should be the pressure of air (in kPa ) to maintain the same pressure at point A