$1.$ Consider the following mathematical function:

f$($x$)=$ x$/(1+$e$^(0\mathrm{.}8$x$))$cos$(4\backslash$pi x$)$

Write a MATLAB script to plot this function over the interval x Use a solid orange line for the curve, set the line width to $2,$ and include labels for the x$-$axis, y$-$axis, and a title for the plot.

Show the resulting plot.