Height Time Graph for Applications of Differentials

As a cliff diver I need you to help me analyse my performance. I jump from a spring loaded board from 10m above sea level. I need you to tell me key data for each of my 5 dives. Please calculate the following... 1. What is the maximum height that I reach? 2. How long am I in the air before hitting the water? 3. What is my speed on entry into the water?