Python

The function square_wave (x) is defined by \[ \text { square_wave }(x)=\left\{\begin{array}{ll} -\pi / 4 & x2 \pi \end{array} ight. \] Plot the graph of square_wave (x) for 0.2x2+0.2 using plt.plot. On the same axes plot partial_sum (x,n) for n=3, and n=15