Use MATLAB give the code down for $3$ parts and donot USE PYTHONQ$3-$

$1-$ Determine the two roots of the equation $x^3-5x^{2\mathrm{.}5}+e^{0\mathrm{.}9x}+4(x+1)=-2.$

$2-$ Use MATLAB to calculate the following integrals:

$($a$){\displaystyle \underset{1}{\overset{8}{}}}\frac{e^x}{x^3}dx$

$($b$){\displaystyle \underset{0}{\overset{4}{}}}cos(x)e^{\sqrt[\phantom{2}]{x}}dx$

$3-$ Use a MATLAB built$-$in function to numerically solve:

$\frac{dy}{dx}=-x^2+\frac{x^3{e}^{-y}}{4},$ for $1x5$ with $y(1)=1$

Plot the solution. Please USE MATLAB Give the code in the answers. Donot use python.