(a) Find a vector parametric equation for the part of the saddle z = xy inside the cylinder x² + y² = 36. Ŕ(u, v) = for 0 ≤ u ≤ 6 and 0 ≤ v ≤ 2ñ. (b) eux ev = (c) Compute and simplify: |ẽu × ēv| = (d) Evaluate a double integral for the surface area of the part of the saddle inside the cylinder.

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