A wave propagates on a string with the wave function poin $-80t),$ where $x$ and $y$ are in meters and $t$ is in seconds. The maximum transverse acceleration of any element on the string is:

amax$=36\frac{m}{s^2}$

amax$=54\frac{m}{s^2}$

amax$=128\frac{m}{s^{***}}2$

amax$=72\frac{m}{s^2}$