An archer uses a bow to shoot a 148 g arrow vertically upward. The effective spring constant of the bow at full flex is

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An archer uses a bow to shoot a 148 g arrow vertically upward.
The effective spring constant of the bow at full flex is 964 N/m.
After release, the arrow attains a maximum height of 54.1 m.
Answer tolerance of ±5 on the third signficant
digit.
a) Calculate the bow string's maximum displacement.
b) Calculate the arrow's vertical velocity at a point where the
string is three quaters the way back to its equilibrium
poisition.