Let (x) = x. (a) Sketch the function over the interval [0, 4] and the rectangles corresponding

Let ƒ(x) = √x.
(a) Sketch the function over the interval [0, 4] and the rectangles corresponding to L₄. Calculate the area contained within them.
(b) Sketch the function over the interval [0, 4] again but with the rectangles corresponding to R₄. Calculate the area contained within them.
(c) Make a conclusion about the area under the curve ƒ(x) = √x over the interval [0, 4].