1. The problem statement, all variables and given/known data Attached. 3. The attempt at a solution I've attached it. I'm not sure if I've gone wrong somewhere; I've got an extremely high quantum number, but I guess that should be expected considering we're dealing with macroscopic objects. Could someone kindly check to see if I've got it right so far. And if so, how do I carry out the last part of the question? The part about estimating the smallest fractional change QM allows and are these effects perceptible to us. I'm not quite sure how to tackle that part.