Q$2)$ Evaluate the following integral using the trapz$()$ function in Matlab, and compare your result to the theoretical value.

$I={\displaystyle \underset{1}{\overset{7}{}}}x{e}^{-3x}dx$

Comment on the accuracy and how it can be improved, if necessary.

$*$Please include the code you used to solve the integral in Matlab using trapz$()$ function! Thanks