1. The problem statement, all variables and given/known data The 80-cm-tall, 65-cm-wide tank shown in the figure is completely filled with water. The tank has marks every 10 cm along one wall, and the 0 cm mark is barely submerged. As you stand beside the opposite wall, your eye is level with the top of the water. Part A asked "Can you see the marks from the top of the tank (the 0 cm mark) going down, or from the bottom of the tank (the 80 cm mark) coming up?" I already answered this question: We can see the marks from the bottom of the tank coming up. Which is the lowest or highest mark, depending on your answer to part a, that you can see? d=__cm I have attached an image I found online of the figure 2. Relevant equations The only equation that I can think of would be Snell's Law n1sinθ1=n2sinθ2 3. The attempt at a solution I am not sure how or where to start. If the 0 cm is at eye level, then wouldn't that be the highest mark you can see? Should I be sketching rays from each mark to the eye? If so, wouldn't they all reach the eye?