On a calm, bright day, you're scuba diving in a deep lake (n=1.33), 5.60 m from your sailboat. When you are 3.00 m below the surface, the top of the sailboat mast appears to you to be in a direction 34.0 degrees from vertical. Calculate the height of the mast from your point of view, the entire sky appears to be confined to a bright disk directly above you on the surface of the water. Determine the diameter of this circle.