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The displacement of a particle is represented by the
P following equation:

W
\[
s=3 t^{3}+7 t^{2}+5 t+8
\]
where \( s \) is in metres and \( t \) in seconds. The acceleration of the particle at \( t=1 \mathrm{~s} \) is
(1) \( 14 \mathrm{~m} / \mathrm{s}^{2} \)
(2) \( 20 \mathrm{~m} / \mathrm{s}^{2} \)
(3) \( 32 \mathrm{~m} / \mathrm{s}^{2} \)
(4) Zero
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