8)[16] Consider the function f(x) = 2-42 a) Approximate fo f(x)dr with four midpoint rectangles. b) Sketch the graph of f (r) and the rectangles that represent your approximation in a). c) Evaluate ff(r)dr by both the Fundamental Theorem of Calculus and by using the calculator. d) Explain whether ff (r) dr represents an area. You must justify your