A high jumper jumps 1.20m straight up. what speed will he leave the ground?

A high jumper jumps 1.20m straight up. what speed will he leave the ground? 
Update: a) how high does a ball rise if it is thrown vertically upwards at 7.00m/s?
b)how long does it take to reach its highest position?
c) how long does it take to return to your hand after leaving it?
d)what is velocity when it strikes your hand? 
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