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Write a single expression using the Trapezoid Rule, which will approximate the area under over the interval using five trapezoids of equal height. Do not evaluate the expression. 

The Trapezoid RuleFirst quadrant, y axis unscaled, with label, f of a, almost to the bottom, & label f of b, almost to the top, curve coming through the origin, rising, then falling slightly, then rising & continuing up & right, 4 equal width vertical right trapezoids, bottom edges on x axis, left edge of first labeled, a, right edge of last labeled, b, each on the x axis, with top edge left & right vertices of each , on the curve, second bar is shaded & labeled delta x.

The Trapezoid Rule can be used to approximate the area under a curve if the widths, , of all trapezoids are of equal size: