A transverse wave on a string is described by the wave function
$$y=0.120 \sin \left(\frac{\pi}{8} x+4 \pi t\right)$$
where $x$ and $y$ are in meters and $t$ is in seconds. Determine (a) the transverse speed and (b) the transverse acceleration at $t=0.200$ s for an element of the string located at $x=$ $1.60 \mathrm{m} .$ What are $(\mathrm{c})$ the wavelength, $(\mathrm{d})$ the period, and (c) the speed of propagation of this wave?