Answer:
a) 3.65 seconds
b) 35.87 m/s
Step-by-step explanation:
s = Displacement = 65.6 m
u = Initial velocity
v = Final velocity
t = Time taken
a = Acceleration due to gravity = 9.81 m/s² (downward direction is taken as positive and upward is taken as negative)
b) Equation of motion

Initial pop up velocity is 35.87 m/s
a)

It took 3.65 seconds to reach this height