If a parametric surface given by r1(u, v) = f(u, v)i + g(u, v)j+ h(u,v)k and –1< u<1, –2 < v< 2, has surface area equal to 5, what is the surface area of the parametric surface given by r2(u, v) = 3r1(u, v) with –1< u<1, –2

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