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A particle is moving along \( x \)-axis whose position is given by \( x=4-9 t+\frac{t^{3}}{3} \) then choose the
\( \mathrm{P} \)
W CORRECT statement for this motion-
(1) Direction of motion is not changing at any of the instants
(2) For \( 0\mathrm{t}2 \mathrm{~s} \), the particle is speeding up
(3) Direction of motion is changing at \( t=3 \mathrm{sec} \)
(4) For \( 0\mathrm{t}3 \mathrm{~s} \) the particle is speeding up.
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