Solve the all parts of given question:
Question: A 63-kg trampoline artist jumps upward from the top of a platform with a vertical speed of 4.9m/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 6.8×104N/m , how far does he depress it?
Please show all work and steps to determine how far he depresses it.