Take the function f (z) = Vã. over x E [0,4]. Answer the following parts: (a) Estimate the area under the graph of f(x) with 4 approximating rectangles, using right endpoints of subintervals and an equally spaced set of 5 grid points over x E [0,4]. (b) Now apply the Fundamental Theorem of Calculus to compute the exact area under the curve: Va dx. Without comparing numerical values is your answer from part(a) an overestimate or underestimate? Explain your answer based on the properties of the integrand f (2) = Va.

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