(a) Sketch the region R under the graph of fon the interval (0,2), Find its exact area using geometry. square units (b) Use a Riemann sum with four subintervals of equal length (n 4) to approximate the area ot R. Choose the representative points to be the left endpoints of the subintervals square units () Repeat part (b) with eight subintervals of equal length (n8). square units

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