PROBLEM $2$: $(30$ POINTS$)$ Write a user$-$defined MATLAB function for the following math function: f$($x$)=0\mathrm{.}8$x$^2*$e$^0\mathrm{.}5$x $+2\mathrm{.}5$x$^3*$e$^0\mathrm{.}5$x The input to the function is x and the output is y$.$ Use the created function to perform the following calculation and MATLAB plotting. $1)$ Use the function to calculate y$(5)$ and y$(10).2)$ Use the function to make a plot of y$($x$)$ for $10<=$ x $<=10$ with a step of $0\mathrm{.}2.($Note that x is a vector in this case.$)$