Solve the all parts of following problem given below:
Problem: A 74-kg trampoline artist jumps upward from the top of a platform with a vertical speed of 4.5m/s.
Part A: How fast is he going as he lands on the trampoline, 2m below?
Part B: If the trampoline behaves like a spring of spring constant 5.8×104N/m, how far does he depress it?
I want help to find how fast is he going as he lands on the trampoline and express your answer to two significant figures and include the appropriate units.