Physics GR12

A bungee jumper of mass 75kg is stadnding on a platform 53m above a river. The length of the unstretched bungee cord is 11m. The spring costant is 65.6N/m. Calculate the jumper's speed at 19m below the platform on his first fall.

[Also, please state which height you usd and why,and why isn;t Eg used for conservational energy at end.Why is it (Eg= Ek+Ee) and not (Eg=Ek+Ee+Eg), because he still has gravity potential anergy at end doesn't he?]

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