Solve the all parts of given question:
Question: Multiple-Concept Example 6 reviews the concepts that play a role in this problem. A diver springs upward with an initial speed of 1.89 m/s from a 3.0-m board.
Part A: Find the velocity with which he strikes the water.
Part B: What is the highest point he reaches above the water?
Please show your work, so I can understand process. Thanks!