$(1\mathrm{.}25$ points, Explore MATLAB on Your Own$)$ Write a MATLAB $.$m file to plot the $3-$D plot of amultivariable function z$($x$,$ y$)=$ x$20\mathrm{.}5$y$2$ over x $]2,2[$and y $]2,2[.$ For both x and y axes,choose the grid size to be $0\mathrm{.}05.$ Clearly label and title your plot. $($Hints: $(1)$ you may see that z is thefunction of both variables x and y; $(2)$ The function, mesh, may help you to draw the figure.$)$