You (height of your eyes above the water, 1.75 ) are standing 2.00 from the edge of a 2.50–deep swimming pool.

You (height of your eyes above the water, 1.75 ) are standing 2.00 from the edge of a 2.50–deep swimming pool. You notice that you can barely see your cell phone, which went missing a few minutes before, on the bottom of the pool.