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The 1st quadrant area bounded by y = vx and lines y = 1 and y = 4 and Y-axis is rotated about Y-axis.

The 1st quadrant area bounded by y = vx and lines y = 1 and y = 4 and Y-axis is rotated about Y-axis. a) Find the volume of the solid. b) Make a 3D-sketch, use disk method, and show the element of volume and corresponding differential of volume. c) Find the coordinates of the Centroid %3D

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