Your question is Bucket Pressure vs Time. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
In a scenario with a sealed bucket half full with an airtight lid and a valve on the bottom, how does air pressure change over time as the water drains, and how do the curves differ for slow versus fast draining?