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An isolated particle of mass \( \mathrm{m} \) is moving in horizontal plane \( (\mathrm{x}-\mathrm{y}) \) along the \( \mathrm{x} \)-axis at a certain height above the ground. It suddenly explodes into two fragments of masses \( \mathrm{m} / 4 \) and \( 3 \mathrm{~m} / 4 \). An instant later, the smaller fragment is at \( \mathrm{y}=+15 \mathrm{~cm} \). The larger fragment at this instant is at
1) \( y=-5 \mathrm{~cm} \)
2) \( y=+20 \mathrm{~cm} \)
3) \( y=+5 \mathrm{~cm} \)
4) \( y=-20 \mathrm{~cm} \)
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