4. Find the area of the surface generated when the given curve is revolved about the given axis. 3, for 0 < y s 8, about the y-axis. Find (a) A surface is generated by revolving the line x = the area of the resulting surface in the following ways. (i) Using calculus with g(y) = 3. (ii) Using geometry, after first determining the shape and dimensions of the surface. (b) y = for 2 I< 4; about the y-axis %3D (c) y = v4x + 6, for 0 < x< 5; about the x-axis

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