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let M be the portion of the paraboloid= 2 + 2 in the first octant bounded by the cylinder 2 + 2 =3, the plane=and

let M be the portion of the paraboloid=2+2 in the first octant bounded by the cylinder2+2=3, the plane=and the-plane. More precisely,

={(,,):=2+2, 2+23, 0}.

i) Using cylindrical coordinates, find a parametrization (,) for, clearly indicating its domain. Compute the normal vectorr, and decide if it is upward (positive-component) or downward (negative-component).

ii)Consider a fluid with density(,,) =1 / (1+x2+y2) measured in/3 flowing with velocity

(,,)=(, , 1) measured in/.The net amount of fluid that goes throughper second of time in a specified direction is referred to as themass flow rateof the fluid through. It is given bythesurface integral:

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. N dS. M

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