A horizontal stretched string, fixed at two ends, is vibrating in its fifth harmonic according to the equation, $y(x$, $\mathrm{t})=(0.01 \mathrm{~m}) \sin \left[\left(62.8 \mathrm{~m}^{-1}\right) \mathrm{x}\right] \cos \left[\left(628 \mathrm{~s}^{-1}\right) \mathrm{t}\right]$. Assuming $\pi=3.14$, the correct statement $(\mathrm{s})$ is (are) :