$1\mathrm{.}1$ Download the x$-$ray image The image is for a Plexiglas material with different thicknesses $($d$=1\mathrm{.}5$ mm$,$ d$2=2$ mm$,$ d$3=1$ mm and d$4=2\mathrm{.}5$ mm$)$ as shown in the figure below. d$1$ d$2$

d$3$ d$4$

$1\mathrm{.}2$ Use a software platform, such as MATLAB for displaying, processing, and analyzing the x$-$ray image.

$1\mathrm{.}3$ Calculate the attenuation coefficient of this material using the equation:$I=I_0{e}^{-x}.$