Differential Equation of Wave

Q. The wave function of a triangular wave pulse is defined by the relation below at time $t=0\text{sec}$
$y=\{\begin{array}{cc}mx& \text{for}0\le x\le \frac{a}{2}\\ -m(x-a)& \text{for}\frac{a}{2}\le x\le a\\ 0& \text{every where else}\end{array}$

The wave pulse is moving in the + X direction in a string having tension $T$ and mass per unit lengh $\mu$. The total kinetic energy present with the wave pulse is

1. $\frac{m^{2}Ta}{2}$
2. $m^{2}Ta$
3. $\frac{3m^{2}Ta}{2}$
4. None of these