(a) Estimate the area under the graph of /(x) = 5v x from x = 0 to x = 4 using four approximationg rectangles and right endpoints. (Round your answers to four decimal places.) Ra =[ Sketch the graph and the rectangles. (x) = 5VX (x) = 5VX (x) = 5VX (x) = 5VX 6 6 6 4 2- 2 2 2 2 DO Is your estimate an underestimate or an overestimate? O overestimate O underestimate (b) Repeat part (a) using left endpoints. LA = L Sketch the graph and the rectangles. 10 Ax = 5Vx Ax = 5Vx Ax = 5Vx (x = 5Vx 6 4 2 2 2 2 3 DO 2 3 2 3 Is your estimate an underestimate or an overestimate? O overestimate O underestimate