Please code this using C language and please comment on each sections or lines to understand.

1. Introduction In this program, you will design functions that allow you to approximate the integral of a function, f(x), using the trapezoidal rule. To find this integral-the area under the curve-we can approximate the area as a series of trapezoids, as shown below: Un Vn-2 Vn-1 In the figure, the range [a, b] has been divided into n different trapezoids, each of which has the same base, = (b-a). Recall that a trapezoid with base b and sides h1 and h2 has area: 0.5 b (h1 + h2) Therefore, the area of trapezoid number k (1Sk s n) from the figure above is To find the total area under the curve-and therefore the approximate integral sum the areas of all trapezoids: Your integral function will use the equation shown in bold above to approximate the integral, given the endpoints of the interval [a, b] and the number of trapezoids, n