Answer:4
Explanation:
Given


Mass of stick is 
Let T be the tension in the red string
Now if the red string is cut , suppose T is the tension in the blue rod immediately after cut
Therefore



Explanation:
In periodic motion, amplitude is half the distance between the minimum and the maximum.
A = (max - min) / 2
I'm not sure if a figure or some choices go along with this, but the closer to the sea floor the diver is, the lower the potential energy