Write a Matlab function to implement the midpoint rule to approximate Copy$/$paste your code onto this assignment. Your code should have the following:

Variables for $,$ and $.$

A variable, which is the number of rectangles. This should be calculated from the and.

A function $.$

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 $.$