Write a Matlab function to implement the midpoint rule to approximate ${\displaystyle \underset{a}{\overset{b}{}}}f(x)dx.$ Copy$/$paste your code

onto this assignment. Your code should have the following:

Variables for $a,b,$ and $x.$

A variable $n,$ which is the number of rectangles. This should be calculated from the $a,b$ and $x.$

A function $f(x).$

Tips:

You can use the linspace function to generate the grid of $x-$values. This may require a bit of trial and

error, and looking up on the documentation for the linspace function.

Instead of a for loop, it's ok to use the built$-$in sum function to add up the values of $f(x).$