A particle is moving along the \( x \)-axis whose position is given by \( x=4-9 t+\frac{t^{3}}{3...

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A particle is moving along the \( x \)-axis whose position is given by \( x=4-9 t+\frac{t^{3}}{3} \). Mark the correct statement(s) in
\( \mathrm{P} \) relation to its motion.

W
(1) The direction of motion is not changing at any of the instants.
(2) The direction of the motion is changing at \( t=3 \mathrm{~s} \).
(3) For \( 0t3 \mathrm{~s} \), the particle is slowing down.
(4) For \( 0t3 \), the particle is speeding up.
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