Example$1($MATLAB$)$

The function $f(x)$ is given in the following tabulated form. Compute ${\displaystyle \underset{0}{\overset{1\mathrm{.}8}{}}}f(x)dx$ with $h=0\mathrm{.}3$

$($a$)$ Use the composite rectangle method.

$($b$)$ Use the composite trapezoidal method.