$22.$ I need MatLab code. Show all work. Will thumbs up$.$Develop a function M$-$file that returns the difference between the passed function's maximum and ninimum value given a range of the independent variable. In addition, have the function generate a olot of the function for the range. Test it for the following function:

$f(x)=e^{-\frac{x}{3}}sin(\frac{3}{x})$ from $x=0\mathrm{.}5to1$

Show all MATLAB codes, answer and figure outputs.