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Parametric representations

Find a parametric representation for each of the surfaces.

1.) The part of the sphere x^2 + y^2 + z^2 = 4 that lies above the cone z= square root of x^2 + y^2

2.) The part of the cylinder x^2 + z^2 = 1 that lies between the planes y= -1 and y= 3

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