please explain the code, thanks.

2.5. Loops and Conditional Statements in MATLAB (cont'd) Pat 2: Simple Integration Now write a function that will approximate the value of the integral f(x) dx x1 You cannot use any of the built-in integration functions in MATLAB, such as quad, trapz, or integral, and instead must rely on the use of some combination of loop and/or conditional statements Your function should have at least two input variables representing the integration limits, x1 and x2, but you do not have to pass in the integrand, f (x), as this can be hardcoded into the function. Your function must be able to calculate the value of the integral to at least a 0.25% accuracy. Your TA will give you the specific integrand, f(x), as well as the integration limits, x, and x2, during the lab. Our integrand is: f(x) - Our limits of integration are: x1 X2