A robotic exploration probe descends through a liquid methane sea on Saturn's moon Titan, from a depth of 4.50 m4.50\text{ m}4.50 m to a depth of 38.50 m38.50\text{ m}38.50 m below the surface.
Given:
Explain why the fluid pressure on the probe increases as it descends deeper.
Calculate the increase in fluid pressure on the probe. State the unit.