What is the pressure gradient in this narrower portion of the tube in kPa/m

You come across an open container that is filled with two liquids. Since the two liquids have different densities, there is a distinct separation between them. Water, which has a density of ?w=1.00×103 kg/m3, fills the lower portion of the container to a depth of 0.215 m. The fluid that is floating on top of the water is 0.307 m deep. If the absolute pressure on the bottom of the container is 1.049×105 Pa, what is the density, ?l, of the unknown fluid? The acceleration due to gravity is ?=9.81 m/s2 and atmospheric pressure is ?0=1.013×105 Pa.

Water flows with a constant speed through a pipe of constant cross-sectional area in the ground floor (y1=0m) of a house. The pipe rises (y2=5.0m) to reach a shower head on the second floor. The pressure at ground level is 140kPa. a) what is the pressure at the shower head? b) what is the maximum height that water from the ground level could reach?

The container shown is filled with a mystery liquid with density 15,000 kg/m3. It is open to atmosphere on the left and closed on the right. What is the pressure at point A, in kPa (kiloPascal)? 1.0 atm = 1.00 × 105 Pa = 100 kPa, and g = 10.0 m/s2. Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.