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(a) Find the exact length of the curve y = 1/6 (x2 + 4)(3/2) , 0...

(a) Find the exact length of the curve y = 1/6 (x2 + 4)(3/2) , 0 ≤ x ≤ 3. (b) Find the exact area of the surface obtained by rotating the curve in part (a) about the y-axis.

I got part a I NEED HELP on part b

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