Trichloroethylene $($A$)$ transitions from solid to vapor $($sublimates$)$ while suspended in stagnant air $($B$)$ at $25\backslash$deg C and atmospheric pressure. This sublimation process occurs at the surface of a solid trichloroethylene sphere with a radius of $4\backslash$times $10-3$ meters. For trichloroethylene at $25\backslash$deg C$,$ the vapor pressure is $1$ mmHg$,$ and its diffusivity in air is $8\mathrm{.}42\backslash$times $10-7$ square meters per second. The density of trichloroethylene is $1512$ kg$/$m$^3,$ and its molecular weight is $132$ g$/$mol$.$ Calculate the rate of sublimation$($flux$)$ and plot the flux as a function of the radius r

$($Please use MATLAB to solve this problem$)$