$(60$ points$)$ Plot steady state temperature distribution within a $4cm8cm$ section of a skin that we are burning by exposing the sides of it to $100C$ and two other sides are exposed to ambient temperature $25C.$ If required, use COMSOL to find the thermal properties of skin.

a$)(20$ pints$)$ Do calculations with $9$ internal nodes.

$x=1cm,y=2cm$

b$)(40$ points$)$ Write a code that can calculate temperature with any number of nodes. Test it on $10$ and $100$ nodes and plot the temperature distribution within the square. $($for this code use $x=y=1cm)$