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A particle is thrown up vertically with a speed ' \( v_{1} \) ',
P in air. It takes time \( t_{1} \) in upward journey and \( t_{2}\left(t_{1}\right) \)

W in the downward journey and returns to the starting point with a speed \( v_{2} \). Then:
(1) \( v_{1}=v_{2} \)
(2) \( v_{1}v_{2} \)
(3) \( \quad v_{1}v_{2} \)
(4) Data is insufficient
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